MEDIUM / Unify delete() API with DeletableProxyObject (delete(Object...)
method)
Merge branch '1.7.0' of
ssh://git@github.com/openflexo-team/openflexo-core.git into 1.7.0

Conflicts:
	flexo-foundation/src/main/java/org/openflexo/foundation/view/rm/ViewResourceImpl.java
	flexo-foundation/src/main/java/org/openflexo/foundation/viewpoint/rm/VirtualModelResourceImpl.java
LOW / Removed debug (sorry for conflict)