Update to current model: rules are transformation units -> separate rule
folder in tree view is removed
Visualisation: transformation units that are used as sub units are
marked
removed API baseline builder from muvitor project
compatibility of TGG and flat editor version
Merge remote-tracking branch 'remotes/origin/HOTFIX'

Conflicts:
	org.eclipse.emf.henshin.model/META-INF/MANIFEST.MF
	org.eclipse.emf.henshin.model/src/org/eclipse/emf/henshin/model/HenshinPackage.java