improve overview layout
make usb host mode optional
0.1.35

# 0.1.35
* Add settings option to control # of meter change needed for voice announcement (actually this was in 0.34)
* Shorten some mode names so they sound better
* Make usb host mode optional (so folks can use UDP on non host mode devices)
* Fix overview layout so it will look good on more devices
* Add preferences option to automatically back-up parameters to the SD card

For next release:
* Use new icons
* Do something to allow waypoint list selection with action bar ( http://stackoverflow.com/questions/3111354/android-listview-stay-selected )
* Show heartbeat lost on the overview screen
* FIXME: add waypoint change type (via menu dropdown)
* FIXME: make a website
* Change waypoint icons as appropriate...
* FIXME: Use a state machine to ensure we don't get confused if someone moves a waypoint while we are busy uploading new waypoints
* Clean up package namespace
* Show docs on parameter names (if possible)
* Handle the 'unusual' waypoint representations - look at mavproxy code for clues
* Use the following tip for sw testing: https://github.com/diydrones/ardupilot/commit/deb825b57583a4dd0fb8452ad0afdad07ab34c5b