settings upgrade

- use new and correct domain name in app.py
- implement the settings transfer in install/update.py
settings version upgrade

uncommented the two lines in install/__init__.py
solve problem with QSettings when calling session.py directly

the organization name and domain and the application name must be set
before calling QSettings()
Merge pull request #202 from dliessi/settings-version-1

complete the settings upgrade to version 1