quick fixed unnecessary casts
Warning for missing pligins -> Error
Create UI-Test Plugins
Create QuickFix Test
added removed method
added missing test plugins to test feature
removed deltaj tests
Merge branch 'master' of github.com:tthuem/FeatureIDE

Conflicts:
	plugins/de.ovgu.featureide.fm.core/src/de/ovgu/featureide/fm/core/io/velvet/VelvetLexer.java (replaced with ours)
	plugins/de.ovgu.featureide.fm.core/src/de/ovgu/featureide/fm/core/io/velvet/VelvetParser.java (replaced with ours)
	plugins/de.ovgu.featureide.fm.ui/src/de/ovgu/featureide/fm/ui/editors/FeatureModelEditor.java (change added)