refs :49: references from BaseEntities to BaseValues: class and create_tables
A bit of test cleanup
refs #49: Copy BaseValue attributes when creating an immutable copy of a BaseEntity
refs #49: ValueRepository::fetch_by_id
refs #49: Fetch references from BaseEntities when initialized with a Hash
refs #49: Small refactor in the Repository factory
refs #49: Add fetch_all for BaseValues
refs #49: Mapper#update for BaseEntities with references to BaseValues
refs #49: Cleanup and preparation for the transaction tests
refs #49: Basic Repository operations done
Remove BaseValue transaction tests since we won\'t be adding BaseValues to transactions
refs #49: Add Mapper.for as a convenience method which currently always forwards to Mapper::Sequel.mapper_for
refs #49: Change all references to Mapper::Sequel.mapper_for to Mapper.for
refs #49: cleanup
refs #49: EntitySerializer now works with BaseValues
Merge pull request #60 from mcamou/issue49

closes #49