Cleanup branding and requirements

Remove docutils pin, it's not needed anymore.
Remove oslosphinx import, it's not needed for a stackforge project.
Use normal branding, a stackforge project cannot use the OpenStack
themes.
Update requirements.txt from global requirements.

Change-Id: I0eaecf825272668c16be6cadd917c9b782a8c3a7
Merge branch 'master' of github.com:stackforge/magnetodb-specs