Don't let screen sleep when map is up
add beginnings of rc channel display
share more code between fragments
swappable rc channel display basically works
See below...

# 0.1.28

* Add a basic RC channels info panel
* Add preferences option to force the screen to stay on (default off)
* Fix mode display when waking from sleep
* Change param list over to new fragment system
* Allow swipes to change the info panels
* Add periodic updates for rcchannels (share actor client code with map & mainactivity)

For next release:
* FIXME - add vehicle info panel (should be easy now that I have the slidy panel stuff in)
* FIXME - add waypoint panel (should be easy now that I have the slidy panel stuff in)
* FIXME: fix udp receiver
* 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