Content: moved out of model-directory | renamed Sink -> Pipe| renamed Provider -> Pool
new class: ContentConverter
Content-Renames in dependent classes
introduced XwtConceptUseCaseComposer | renamed ConceptUseCaseComposer -> SwfConceptUseCaseComposer
Limaki.XwtWpf: started ToolStrip-Implementation
Xwt.GtkBackend: better trace
cleanup
AppFactory: catch errors in ResolveAssembly
Cms.BackendController: convert Tif to Png if possible