update resources in the config.xml
add script to build and sign apk
add iOS icons
revamp the form to create a trakly
revamp destination picker:

available now:
- select the destination by dragging a pin on the map (and automatically retrieves the address with the geocoder)
- search for places with an history of the last 10 queries
- clear the selected location (only at the creation)
- add a confirm message if the user has changed the destination without saving it