Currently notifications shown so far are not tracked, thus often it
happens that multiple notifications regarding the same topic appear,
where only one should be shown. The change adds tracking of
notifications being shown within the Notification class.

Notifications cleared by user will be re-shown if device pushes them
again.

If no time was provided in original message, use local time

Since code has gone to public repository, start incrementing relase
number properly.

Whenever a mobile device wakes up, it will send an identity packet from
the same IP, using different 'tcpPort' in the message. This should
prevent device from being closed and reconnected to too frequently.

The sample configuration file is really more like data than a system
wice configuration file deserving a place in /etc. Move to $(datadir).

Use gobject-introspection to generate VAPI

Use a private library instead of rebuilding the same sources multiple times