diff --git a/package.json b/package.json
index f6395747..10824dfc 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,6 @@
     "grunt-contrib-cssmin": "^0.10.0",
     "grunt-contrib-htmlmin": "^0.3.0",
     "grunt-contrib-imagemin": "^0.8.1",
-    "grunt-contrib-less": "^1.4.1",
     "grunt-contrib-uglify": "^0.6.0",
     "grunt-contrib-watch": "^0.6.1",
     "grunt-env": "^0.4.1",
diff --git a/yarn.lock b/yarn.lock
index a95bbd37..c8bad1c1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -84,6 +84,15 @@ ajv@^5.1.0:
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.3.0"
 
+ajv@^5.3.0:
+  version "5.5.2"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-5.5.2.tgz#73b5eeca3fab653e3d3f9422b341ad42205dc965"
+  dependencies:
+    co "^4.6.0"
+    fast-deep-equal "^1.0.0"
+    fast-json-stable-stringify "^2.0.0"
+    json-schema-traverse "^0.3.0"
+
 align-text@^0.1.1, align-text@^0.1.3:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/align-text/-/align-text-0.1.4.tgz#0cd90a561093f35d0a99256c22b7069433fad117"
@@ -271,10 +280,6 @@ asap@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/asap/-/asap-1.0.0.tgz#b2a45da5fdfa20b0496fc3768cc27c12fa916a7d"
 
-asap@~2.0.3:
-  version "2.0.6"
-  resolved "https://registry.yarnpkg.com/asap/-/asap-2.0.6.tgz#e50347611d7e690943208bbdafebcbc2fb866d46"
-
 asn1@0.1.11:
   version "0.1.11"
   resolved "https://registry.yarnpkg.com/asn1/-/asn1-0.1.11.tgz#559be18376d08a4ec4dbe80877d27818639b2df7"
@@ -353,6 +358,10 @@ aws4@^1.2.1, aws4@^1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.6.0.tgz#83ef5ca860b2b32e4a0deedee8c771b9db57471e"
 
+aws4@^1.8.0:
+  version "1.8.0"
+  resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.8.0.tgz#f0e003d9ca9e7f59c7a508945d7b2ef9a04a542f"
+
 backo2@1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/backo2/-/backo2-1.0.2.tgz#31ab1ac8b129363463e35b3ebb69f4dfcfba7947"
@@ -863,6 +872,12 @@ colors@~0.6.0, colors@~0.6.2:
   version "0.6.2"
   resolved "https://registry.yarnpkg.com/colors/-/colors-0.6.2.tgz#2423fe6678ac0c5dae8852e5d0e5be08c997abcc"
 
+combined-stream@1.0.6, combined-stream@~1.0.6:
+  version "1.0.6"
+  resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.6.tgz#723e7df6e801ac5613113a7e445a9b69cb632818"
+  dependencies:
+    delayed-stream "~1.0.0"
+
 combined-stream@^1.0.5, combined-stream@~1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.5.tgz#938370a57b4a51dea2c77c15d5c5fdf895164009"
@@ -1533,12 +1548,6 @@ entities@~1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/entities/-/entities-1.1.1.tgz#6e5c2d0a5621b5dadaecef80b90edfb5cd7772f0"
 
-errno@^0.1.1:
-  version "0.1.6"
-  resolved "https://registry.yarnpkg.com/errno/-/errno-0.1.6.tgz#c386ce8a6283f14fc09563b71560908c9bf53026"
-  dependencies:
-    prr "~1.0.1"
-
 error-ex@^1.2.0:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/error-ex/-/error-ex-1.3.1.tgz#f855a86ce61adc4e8621c3cda21e7a7612c3a8dc"
@@ -1811,6 +1820,10 @@ extend@^3.0.0, extend@~3.0.0, extend@~3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
 
+extend@~3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
+
 extglob@^0.3.1:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/extglob/-/extglob-0.3.2.tgz#2e18ff3d2f49ab2765cec9023f011daa8d8349a1"
@@ -1987,6 +2000,14 @@ form-data@~2.3.1:
     combined-stream "^1.0.5"
     mime-types "^2.1.12"
 
+form-data@~2.3.2:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-2.3.2.tgz#4970498be604c20c005d4f5c23aecd21d6b49099"
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "1.0.6"
+    mime-types "^2.1.12"
+
 fresh@0.2.2:
   version "0.2.2"
   resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.2.2.tgz#9731dcf5678c7faeb44fb903c4f72df55187fa77"
@@ -2381,15 +2402,6 @@ grunt-contrib-imagemin@^0.8.1:
     imagemin "^1.0.4"
     pretty-bytes "^1.0.1"
 
-grunt-contrib-less@^1.4.1:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/grunt-contrib-less/-/grunt-contrib-less-1.4.1.tgz#3bbdec0b75d12ceaa55d62943625c0b0861cdf6f"
-  dependencies:
-    async "^2.0.0"
-    chalk "^1.0.0"
-    less "~2.7.1"
-    lodash "^4.8.2"
-
 grunt-contrib-uglify@^0.6.0:
   version "0.6.0"
   resolved "https://registry.yarnpkg.com/grunt-contrib-uglify/-/grunt-contrib-uglify-0.6.0.tgz#3a271d4dc4daba64691d0d0d08550ec54a7ec0ab"
@@ -2596,6 +2608,13 @@ har-validator@~5.0.3:
     ajv "^5.1.0"
     har-schema "^2.0.0"
 
+har-validator@~5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/har-validator/-/har-validator-5.1.0.tgz#44657f5688a22cfd4b72486e81b3a3fb11742c29"
+  dependencies:
+    ajv "^5.3.0"
+    har-schema "^2.0.0"
+
 has-ansi@^0.1.0:
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/has-ansi/-/has-ansi-0.1.0.tgz#84f265aae8c0e6a88a12d7022894b7568894c62e"
@@ -2759,10 +2778,6 @@ iltorb@^1.0.13:
     node-gyp "^3.6.2"
     prebuild-install "^2.3.0"
 
-image-size@~0.5.0:
-  version "0.5.5"
-  resolved "https://registry.yarnpkg.com/image-size/-/image-size-0.5.5.tgz#09dfd4ab9d20e29eb1c3e80b8990378df9e3cb9c"
-
 imagemin-gifsicle@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/imagemin-gifsicle/-/imagemin-gifsicle-1.0.0.tgz#3286273d28787b710275c17aa2c5c5872c4e1ecd"
@@ -3358,19 +3373,6 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
-less@~2.7.1:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/less/-/less-2.7.3.tgz#cc1260f51c900a9ec0d91fb6998139e02507b63b"
-  optionalDependencies:
-    errno "^0.1.1"
-    graceful-fs "^4.1.2"
-    image-size "~0.5.0"
-    mime "^1.2.11"
-    mkdirp "^0.5.0"
-    promise "^7.1.1"
-    request "2.81.0"
-    source-map "^0.5.3"
-
 levn@~0.2.5:
   version "0.2.5"
   resolved "https://registry.yarnpkg.com/levn/-/levn-0.2.5.tgz#ba8d339d0ca4a610e3a3f145b9caf48807155054"
@@ -3425,7 +3427,7 @@ lodash@^4.0.0, lodash@~4.17.4:
   version "4.17.5"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
 
-lodash@^4.14.0, lodash@^4.8.2:
+lodash@^4.14.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
@@ -3623,6 +3625,10 @@ mime-db@~1.30.0:
   version "1.30.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.30.0.tgz#74c643da2dd9d6a45399963465b26d5ca7d71f01"
 
+mime-db@~1.35.0:
+  version "1.35.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.35.0.tgz#0569d657466491283709663ad379a99b90d9ab47"
+
 mime-types@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-1.0.0.tgz#6a7b4a6af2e7d92f97afe03f047c7801e8f001d2"
@@ -3633,11 +3639,17 @@ mime-types@^2.1.12, mime-types@~2.1.11, mime-types@~2.1.15, mime-types@~2.1.17,
   dependencies:
     mime-db "~1.30.0"
 
+mime-types@~2.1.19:
+  version "2.1.19"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.19.tgz#71e464537a7ef81c15f2db9d97e913fc0ff606f0"
+  dependencies:
+    mime-db "~1.35.0"
+
 mime@1.2.11, mime@~1.2.11, mime@~1.2.9:
   version "1.2.11"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.2.11.tgz#58203eed86e3a5ef17aed2b7d9ebd47f0a60dd10"
 
-mime@^1.2.11, mime@^1.3.4:
+mime@^1.3.4:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
 
@@ -3752,14 +3764,14 @@ nan@^2.1.0, nan@^2.3.0:
   version "2.8.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.8.0.tgz#ed715f3fe9de02b57a5e6252d90a96675e1f085a"
 
-nan@^2.6.2:
-  version "2.10.0"
-  resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
-
 nan@^2.3.2:
   version "2.9.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.9.2.tgz#f564d75f5f8f36a6d9456cca7a6c4fe488ab7866"
 
+nan@^2.6.2:
+  version "2.10.0"
+  resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
+
 natives@^1.1.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/natives/-/natives-1.1.1.tgz#011acce1f7cbd87f7ba6b3093d6cd9392be1c574"
@@ -3812,6 +3824,23 @@ node-gyp@^3.0.3, node-gyp@^3.3.1:
     tar "^2.0.0"
     which "1"
 
+node-gyp@^3.6.2:
+  version "3.8.0"
+  resolved "https://registry.yarnpkg.com/node-gyp/-/node-gyp-3.8.0.tgz#540304261c330e80d0d5edce253a68cb3964218c"
+  dependencies:
+    fstream "^1.0.0"
+    glob "^7.0.3"
+    graceful-fs "^4.1.2"
+    mkdirp "^0.5.0"
+    nopt "2 || 3"
+    npmlog "0 || 1 || 2 || 3 || 4"
+    osenv "0"
+    request "^2.87.0"
+    rimraf "2"
+    semver "~5.3.0"
+    tar "^2.0.0"
+    which "1"
+
 node-pre-gyp@^0.6.39:
   version "0.6.39"
   resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.6.39.tgz#c00e96860b23c0e1420ac7befc5044e1d78d8649"
@@ -3926,7 +3955,7 @@ npm-which@^1.0.1:
     npm-path "^1.0.0"
     which "^1.0.5"
 
-"npmlog@0 || 1 || 2 || 3 || 4", npmlog@^4.0.1, npmlog@^4.0.2:
+"npmlog@0 || 1 || 2 || 3 || 4", npmlog@^4.0.0, npmlog@^4.0.1, npmlog@^4.0.2:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/npmlog/-/npmlog-4.1.2.tgz#08a7f2a8bf734604779a9efa4ad5cc717abb954b"
   dependencies:
@@ -3951,6 +3980,10 @@ oauth-sign@~0.8.1, oauth-sign@~0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.8.2.tgz#46a6ab7f0aead8deae9ec0565780b7d4efeb9d43"
 
+oauth-sign@~0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/oauth-sign/-/oauth-sign-0.9.0.tgz#47a7b016baa68b5fa0ecf3dee08a85c679ac6455"
+
 object-assign@4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.0.tgz#7a3b3d0e98063d43f4c03f2e8ae6cd51a86883a0"
@@ -4281,12 +4314,6 @@ promise@^6.0.1:
   dependencies:
     asap "~1.0.0"
 
-promise@^7.1.1:
-  version "7.3.1"
-  resolved "https://registry.yarnpkg.com/promise/-/promise-7.3.1.tgz#064b72602b18f90f29192b8b1bc418ffd1ebd3bf"
-  dependencies:
-    asap "~2.0.3"
-
 promise@~2.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/promise/-/promise-2.0.0.tgz#46648aa9d605af5d2e70c3024bf59436da02b80e"
@@ -4329,14 +4356,14 @@ protractor@^1.0.0:
     selenium-webdriver "2.44.0"
     source-map-support "~0.2.6"
 
-prr@~1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/prr/-/prr-1.0.1.tgz#d3fc114ba06995a45ec6893f484ceb1d78f5f476"
-
 pseudomap@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
 
+psl@^1.1.24:
+  version "1.1.29"
+  resolved "https://registry.yarnpkg.com/psl/-/psl-1.1.29.tgz#60f580d360170bb722a797cc704411e6da850c67"
+
 "pullstream@>= 0.4.1 < 1":
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/pullstream/-/pullstream-0.4.1.tgz#d6fb3bf5aed697e831150eb1002c25a3f8ae1314"
@@ -4396,6 +4423,10 @@ qs@~6.4.0:
   version "6.4.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.4.0.tgz#13e26d28ad6b0ffaa91312cd3bf708ed351e7233"
 
+qs@~6.5.2:
+  version "6.5.2"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.5.2.tgz#cb3ae806e8740444584ef154ce8ee98d403f3e36"
+
 randomatic@^1.1.3:
   version "1.1.7"
   resolved "https://registry.yarnpkg.com/randomatic/-/randomatic-1.1.7.tgz#c7abe9cc8b87c0baa876b19fde83fd464797e38c"
@@ -4618,6 +4649,31 @@ request@2.81.0:
     tunnel-agent "^0.6.0"
     uuid "^3.0.0"
 
+request@^2.87.0:
+  version "2.88.0"
+  resolved "https://registry.yarnpkg.com/request/-/request-2.88.0.tgz#9c2fca4f7d35b592efe57c7f0a55e81052124fef"
+  dependencies:
+    aws-sign2 "~0.7.0"
+    aws4 "^1.8.0"
+    caseless "~0.12.0"
+    combined-stream "~1.0.6"
+    extend "~3.0.2"
+    forever-agent "~0.6.1"
+    form-data "~2.3.2"
+    har-validator "~5.1.0"
+    http-signature "~1.2.0"
+    is-typedarray "~1.0.0"
+    isstream "~0.1.2"
+    json-stringify-safe "~5.0.1"
+    mime-types "~2.1.19"
+    oauth-sign "~0.9.0"
+    performance-now "^2.1.0"
+    qs "~6.5.2"
+    safe-buffer "^5.1.2"
+    tough-cookie "~2.4.3"
+    tunnel-agent "^0.6.0"
+    uuid "^3.3.2"
+
 request@~2.36.0:
   version "2.36.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.36.0.tgz#28c6c04262c7b9ffdd21b9255374517ee6d943f5"
@@ -4729,6 +4785,10 @@ safe-buffer@^5.0.1, safe-buffer@^5.1.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
+safe-buffer@^5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+
 sass-graph@^2.2.4:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/sass-graph/-/sass-graph-2.2.4.tgz#13fbd63cd1caf0908b9fd93476ad43a51d1e0b49"
@@ -5082,16 +5142,16 @@ statuses@~1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.3.1.tgz#faf51b9eb74aaef3b3acf4ad5f61abf24cb7b93e"
 
-stream-buffers@^2.1.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/stream-buffers/-/stream-buffers-2.2.0.tgz#91d5f5130d1cef96dcfa7f726945188741d09ee4"
-
 stdout-stream@^1.4.0:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/stdout-stream/-/stdout-stream-1.4.0.tgz#a2c7c8587e54d9427ea9edb3ac3f2cd522df378b"
   dependencies:
     readable-stream "^2.0.1"
 
+stream-buffers@^2.1.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/stream-buffers/-/stream-buffers-2.2.0.tgz#91d5f5130d1cef96dcfa7f726945188741d09ee4"
+
 stream-combiner@^0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/stream-combiner/-/stream-combiner-0.0.4.tgz#4d5e433c185261dde623ca3f44c586bcf5c4ad14"
@@ -5437,6 +5497,13 @@ tough-cookie@>=0.12.0, tough-cookie@~2.3.0, tough-cookie@~2.3.3:
   dependencies:
     punycode "^1.4.1"
 
+tough-cookie@~2.4.3:
+  version "2.4.3"
+  resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.4.3.tgz#53f36da3f47783b0925afa06ff9f3b165280f781"
+  dependencies:
+    psl "^1.1.24"
+    punycode "^1.4.1"
+
 transformers@2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/transformers/-/transformers-2.1.0.tgz#5d23cb35561dd85dc67fb8482309b47d53cce9a7"
@@ -5661,6 +5728,10 @@ uuid@^3.0.0, uuid@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.1.0.tgz#3dd3d3e790abc24d7b0d3a034ffababe28ebbc04"
 
+uuid@^3.3.2:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.2.tgz#1b4af4955eb3077c501c23872fc6513811587131"
+
 validate-npm-package-license@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/validate-npm-package-license/-/validate-npm-package-license-3.0.1.tgz#2804babe712ad3379459acfbe24746ab2c303fbc"
@@ -5734,14 +5805,14 @@ whet.extend@~0.9.9:
   version "0.9.9"
   resolved "https://registry.yarnpkg.com/whet.extend/-/whet.extend-0.9.9.tgz#f877d5bf648c97e5aa542fadc16d6a259b9c11a1"
 
-which-pm-runs@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/which-pm-runs/-/which-pm-runs-1.0.0.tgz#670b3afbc552e0b55df6b7780ca74615f23ad1cb"
-
 which-module@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
 
+which-pm-runs@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/which-pm-runs/-/which-pm-runs-1.0.0.tgz#670b3afbc552e0b55df6b7780ca74615f23ad1cb"
+
 which@1, which@^1.0.5, which@^1.1.1, which@^1.2.1, which@^1.2.4, which@^1.2.9:
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.0.tgz#ff04bdfc010ee547d780bec38e1ac1c2777d253a"