henshinTGG: refactoring, removed deprecated NodeGraphType
Merge branch 'HenshinEngineUpdates' of
https://github.com/de-tu-berlin-tfs/Henshin-Editor.git into
HenshinEngineUpdates

Conflicts:
	de.tub.tfs.henshin.tgg.editor/src/de/tub/tfs/henshin/tggeditor/actions/RestrictGraphAction.java