Improve UI behaviour

v1.3

- improve UI behaviour

Fix occasionally failed login with correct credentials, show cache on failed login, improved notification behaviour and reduced lags

v1.2

Merge remote-tracking branch 'origin/master'

Fix login by updating request sender

The DSB server now requires the request to set "AppVersion" to 2.9.5, hence this update.

First (debug signed) release

By this version, OpenDSBmobile is in a quite usable state for everyday use.
The database structure might still change in the future, which might require deleting the old version, so backup your credentials before doing that.