added ImportUri, organized Imported Pacakges

...AdaptationProcess_importDeclaration_ImportDeclaration.gif

...mm.adaptation.edit/icons/full/obj16/ImportDeclaration.gif

edu.kit.ipd.descartes.mm.adaptation.edit/plugin.properties

...ation/provider/AdaptationActionOperationItemProvider.java

...tation/provider/AdaptationItemProviderAdapterFactory.java

...mm/adaptation/provider/AdaptationProcessItemProvider.java

...mm/adaptation/provider/ImportDeclarationItemProvider.java

...cartes/mm/adaptation/provider/LoopActionItemProvider.java

...scartes/mm/adaptation/provider/ObjectiveItemProvider.java