Merge pull request #71 from Jorenm/master

Phase 2 changes
Updated for R2 changes. Fixed some sphinx warnings.
Merge pull request #72 from bensternthal/Doc-Update

Updated for R2 changes. Fixed some sphinx warnings.
Moved category docs to one location, clarified hp_featured and hp_recent are optional.
Merge pull request #73 from bensternthal/hp-doc-adjust

Moved category docs to one location, clarified hp_featured and hp_recent...
Reworked block grid content filter
Merge branch 'master' of github.com:Jorenm/theopenstandard