Rename LTI test fixtures to prevent conflict with CTI fixtures
Fixed skip_class in EntitySerializer
Update README.md
Started implementation of CTI. create_tables now works correctly.
Unify BaseEntity collection accessors to 'add_'
Fixed some versioning issues
Implemented fetch_by_id and fetch_all in CTI
Merge branch 'master' of https://github.com/nandosola/dilithium-rb into #40

Conflicts:
	lib/persistence/mapper.rb