MEDIUM : added validation rule to remove references to
virtualModelInstance modelSlots + clean-up and fix various issues with
virtualModelInstance management (Work In Progress)
LOW : removing static initiatilizations
LOW : Fix issue with getFlexoConceptType, adapt to reflexive ModelSlot
removal
LOW : fix infinite loop.
Merge branch '1.7.0' of ssh://git@github.com/openflexo-team/openflexo-core.git into 1.7.0