Change weatherinfo data source from Google to openweathermap.org

The Google API was turned off mid 2012.

Task-number: QTBUG-31706
Change-Id: Ia7a04ed2e0f6e411f6a65765c59892be4a14ddb5
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Improve weather app icon layouts to decrease chance of overlap

Change-Id: I2f236d0bda50f92840f908305916a082fb59700c
Reviewed-by: QTBUG-18405
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>