I went crazy effective!

- Renamed LocationService to DownloadService
- Added bitmaps in CityActivity
- Added DMIApplication, to be aple to send Broadcast to Main- or
CityActivity, based on which one is currently visible.
- DownloadService now stops itself, when finished.
- Added functionality to update button.
- Added ScrollView in CityActivity
- Clean up in old files and some Bitmap stuff.
- Added lifecycle logs for activitys.
- etc...