new features for model integration
Merge branch 'MainDevelopment' into modelIntegration

Conflicts:
	de.tub.tfs.henshin.tgg.editor/src/de/tub/tfs/henshin/tggeditor/commands/create/rule/GenerateOpRuleCommand.java
	de.tub.tfs.henshin.tgg.editor/src/de/tub/tfs/henshin/tggeditor/util/GraphUtil.java
henshinTGG: added new files for model integration