21.6: Bug fixes. Updated to use more recent version of Google Play Services.

21.4: Fixed another bug with taking photos from the app.

21.3: Fixed bug with taking photos from app.

21.2: Better error handling for route creation. Show messages on Goto page when switching to next waypoint or previous waypoint on a route. Pop up a dialog if an error occurs when taking a photo (rather than showing just a brief Toast message).