move GetInstanceConstraint to systemConstraint, remove AliveConstraint
Merge remote-tracking branch 'origin/dev' into erik
Refactor vertex instanciation
Merge
Merge branch 'dev' of
https://github.com/genericsystem/genericsystem2014.git into dev

Conflicts:
	gs-kernel/src/main/java/org/genericsystem/kernel/AbstractVertex.java
Comment check
Merge remote-tracking branch 'origin/dev' into erik