refs #7 : Refactor OOP/EDA

* exceladdins cleanup
* Configuration API change.
* kernel provide more properties.
* configmain.py : implement new Configuration
* transition.py : comments modifications, clean up, implement new
Configuration
* transitioncore : TODO..., minor changes
* appmanager : update comments, use more kernel, run_app improved (wb
app doesn't work by now). ugly commented copy-paste at the end of file.
* comments : comeventslistener, eventdispatcher,
* added a ConfigService for testing purposes. Doesn't work (see #8)