Implemented the following methods in cache.GenericService:
	getMetaComposites
	getSuperComposites
	
Updated some tests in Cache layer.
Moved equiv from cache.EngineService to cache.Engine 
	(to avoid naming 	collision in compile time)
Added and fixed some tests into the Cache layer.
Merge branch 'master' of
https://github.com/genericsystem/genericsystem2014.git

Conflicts:
	gs-cache/src/test/java/org/genericsystem/cache/Engine.java