fixed issue #3

edu.kit.ipd.descartes.mm.applicationlevel.edit/.gitignore

...ntity_relationships_DependencyPropagationRelationship.gif

...gRequiringEntity_relationships_DependencyRelationship.gif

...l/functions/provider/ExplicitDescriptionItemProvider.java

...nlevel/functions/provider/RandomVariableItemProvider.java

...rovider/ComposedProvidingRequiringEntityItemProvider.java

...ovider/InterfaceProvidingRequiringEntityItemProvider.java

edu.kit.ipd.descartes.mm.applicationlevel.editor/.gitignore

edu.kit.ipd.descartes.mm.applicationlevel/.gitignore

...artes.mm.applicationlevel/model/applicationlevel.genmodel

...ationlevel/parameterdependencies/ControlFlowVariable.java

...l/parameterdependencies/impl/ControlFlowVariableImpl.java

...d/descartes/mm/applicationlevel/system/SystemPackage.java

...rtes/mm/applicationlevel/system/util/SystemValidator.java