Move oslosphinx to requirements

The original listing in the readme seems to have gone missing.

I am trying to import the documentation into readthedocs so we can
have a nice list of the available dashboards, but it needs oslosphinx
to build.

Change-Id: Iee4a8b4e8565e566be0e6790a82c0d8f0dc7cfde

README.rst

@@ -45,7 +45,7 @@ the dashboard file you want the URL for::
 Then put the URL in your browser and off you go.
 
 A daily updated index of all available dashboards is available
-at http://ghostcloud.net/openstack_gerrit_dashboards/.
+at `<https://readthedocs.org/gerrit-dash-creator>`__
 
 
 Contributions Welcomed

requirements.txt

@@ -7,4 +7,5 @@ jinja2
 pbr>=1.6
 six>=1.9.0
 launchpadlib
+oslosphinx
 simplejson>=2.2.0

test-requirements.txt

@@ -9,7 +9,6 @@ doc8
 fixtures>=1.3.1
 python-subunit
 sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
-oslosphinx
 testrepository>=0.0.18
 testscenarios>=0.4
 testtools>=1.4.0