Fixed tests for Enumerable
removed superfluous InstanceMethods
added Gemfile
Added tests for Enumerable interface.
Merge branch 'matthias/enumerable-tests' into develop

Conflicts:
	lib/maglev_record/base.rb
	lib/maglev_record/enumerable.rb
Implemented model delete.
Removed old memento.
Removed memento reference.
Restructured methods and implemented reset! to reset all attributes.
Added tests for validation.
Update README.md
Update README.md
Started implementing attr_reader and attr_writer.
Merge branch 'develop' of github.com:knub/maglevrecord into develop
Fixed attr_reader and attr_writer bug and moved to separate module.