Resolved synchronization problems when restarting the application
directly to the map view. It failed due to initialization problems. Now,
the main activity only cares on init synchronization tasks, while the
map stations only initializes after an upgrade. If there is no
information about stations, they are not shown in the map. Moreover, the
app exits after 3 seconds if there is no internet connection when
opening. No more known bugs. Tested on Android 4.3 and 2.2. Ready for
production.