Adding test to see if data is not referencing input data
Fixing issue were memory-engine would manipulate data becuase it was referancing it

Conflicts:
	lib/memory-engine.js
Adding events for after crud functions and tests

Conflicts:
	lib/memory-engine.js
Merge branch 'master' of github.com:serby/save into dataReferencingFix

Conflicts:
	lib/memory-engine.js
	test/engine.tests.js
Adding new emits to readme
Merge pull request #13 from Joshwlsn/dataReferencingFix

Data referencing fix