1.4.3:

New features & breaking changes:
* Redesign of the notes window: This is now a constant area at the bottom of the screen. Creating notes can be done even faster now.
* Export as GPX (next to the already existing GeoJSON export)
* Clear cache manually (via settings screen)

Bug fixes:
* Map rotation stays after switching apps
* Back-button now also saves settings
* Media-store handling didn't worked (removed functionality of adding photos to the Android media store)
* Use correct MIME type for GeoJSON export
* Fix spelling mistake on feedback-button
