add CF skeleton
Merge branch 'to_delete' of github.com:ClaraVista-IT/matrixFactorization into to_delete
CFSAG done, test needed
Merge branch 'to_delete' of github.com:ClaraVista-IT/matrixFactorization into to_delete

Conflicts:
	src/main/scala/dataset/CFDataSet.scala
	src/main/scala/dataset/MUMIDataSet.scala
	src/main/scala/dataset/MUSIDataSet.scala