Moves PermMockTrait into a namespace
Adds document on the new api
Merge branch 'feature/serve-etag' into feature/single-perms
Updates route to add a perm name
Updates Store to deal with one row per perm name
Adds test for retrieving multiple perms
Implements testing if a single perm exists on a Subject Object pair
Implements removing perms from Subject Object pairs
More delete perm tests
Updates comments
Adds test to delete all perms for a Subject Object pair
Comments out failing test
Updates Perm class to not use Subject and Object types
Removes use of PermMockTrait
Fixes some Store tests
Updates routes to use new api
Updates documentation notes
Refactors database table names
Removes unused Subject classes
Removes unused Object type classes