Added author presence validation on content_item. Wrote first pass at content_item specs. Changed person model to has_many for rating_groups instead of ratings.
Added author presence validation on content_item.
Wrote first pass at content_item specs.
Changed person model to has_many for rating_groups instead of ratings.

CivicCommons/CivicCommons,CivicCommons/CivicCommons,CivicCommons/CivicCommons,CivicCommons/CivicCommons