Fix problem with RC Screen

Added onpause, onresume, and ondestroy methods to rc mode. There was an
error where when you switched to rc mode more than once after the app
was started it would not work. These methods resolved the problem.
Add Record Me mode.

Record me allows recording of follow me path. Saves into waypoints folder in the same format as saved points from planning mode. Added a setting to enable disable recordme.
Change the pref KeepScreenBright to on by default.
Change the default altitude to 50m.

That way it is a middle term for Copters and Planes. This should be modified on the furture.
Merge pull request #148 from arthurbenemann/prefChange

Preferences  changes

Change the pref KeepScreenBright to on by default.
Change the default altitude to 50m.
Moving duplicated code to a single method.
Merge pull request #149 from arthurbenemann/RCfix

Fix problem with RC Screen
Fix imports so we have no warnings
Extracting the Record Me mode from FollowMe.java to a new class.
Cleaning RecordMe.

Renaming functions, removing duplicated code for saving waypoints and removing unused variables.
Start using the Record Me function in the app.

Added a button to the planning screen to do the recordMe function.
And the code necessary to run it.
Fix some project paths that broke the build process.
Merge pull request #153 from arthurbenemann/fixBuildPath

Fix some project paths that broke the build process.
Merge branch 'master' into RecordMe
Fixed some bugs in the recordMe mode.
Now the first record waypoint is used as the home location.
And the waypoints list is cleared when finishing recording.
Changing the output filename of record-Me.
Removing the enable_record_me  preferrence.

We don't need a "in development" preference since this feature will hardly cause some damage to anyone.
Merge pull request #151 from arthurbenemann/RecordMe

The record-me mode is ready for production.
Updating ChangeLog.
New launcher icons by Steven Tisseyre.