Update the .gitignore

This was copied from tripleo-common, which was far more comprehensive.

Change-Id: I322d041d50fef757c2d0d3e01204ae88246d553a

.gitignore

@@ -1,5 +1,57 @@
-__pycache__
-.testrepository
+*.py[cod]
+
+# C extensions
+*.so
+
+# Packages
+*.egg*
+dist
+build
+eggs
+parts
+bin
+var
+sdist
+develop-eggs
+.installed.cfg
+lib
+lib64
+
+# Installer logs
+pip-log.txt
+
+# Unit test / coverage reports
+.coverage
+cover
 .tox
-*.egg-info
+nosetests.xml
+.testrepository
+.venv
 .stestr
+
+# Translations
+*.mo
+
+# Mr Developer
+.mr.developer.cfg
+.project
+.pydevproject
+
+# Complexity
+output/*.html
+output/*/index.html
+
+# Sphinx
+doc/build
+
+# pbr generates these
+AUTHORS
+ChangeLog
+
+# Editors
+*~
+.*.swp
+.*sw?
+
+# Files created by releasenotes build
+releasenotes/build