Implemented a notification mechanism to show needed interactions
Cleanup and refactoring of consumer

Situation solver are consumer only and do not contain any event producing
procedures anymore
Fixed gendarme issue by addin serialization to exception
Added copyright infos
DataSpace Sync Client Release 2.0.2

UI-Bugfixes:
* Upload status of a file is recalculated if the file grows while reading the file
      Fixes mantis issue 4032
* Linux: Cropped text in setup dialog
      Fixes mantis issue 3435
Improved error handling and notification for non UTF-8 supporting backends
      Fixes mantis issue 4331

Merge branch 'rc/2.0.2'