Location Converter was extended.
Added unit tests for GeoConversion.

Added fancy icons for Android app.
- Added MSpec acceptance tests for ItemsViewModel

- MSpec Helper for ViewModel (Clearing and registering instances to IoC)
- Additional unit tests
- Refactoring of GeoCoordinate conversion
- Added some fancy icons to Android solution
- Read-only flag to Android Manifest because somehow the permissions are resetted after each build.