Feat(context): Thread context throughout data layer. TODO: Update
WIP(rbac): Large DB interface refactor. Prep for rbac work. TODO: All
tests have broke. Fix them.
Fix(ContentType+Content transaction): Fix content iterator transaction
usage in cache/contenttype.go where cache was locking table so
contenttype failed to delete.
Fix(Security): Fixing issue with caching where users could access spaces
they were not suppose to.
Fix(cache): Break cache on content under contenttype when contenttype is
Fix(cache break): When a contenttype is deleted break cache for all
content that was referring to content under deleted contenttype.
Feat(contenttype): Content Types can now be updated.
WIP(cache): Improving cache code reuse.
Feat(cache): Adding more cache; cache for contenttype and space.