Added preferences for RC screen
Now the user can:
*select between mode 1 and 2
*reverse each channel
*choose if throttle should return to center or not
Merge pull request #200 from realbuxtehuder/RCScreen

Added preferences for RC screen
Preference for QuickModeButtons mode
Extend the SettingsActivity to show the current prefernce values
Merge pull request #202 from realbuxtehuder/RCScreen

    Preference for the QuickButtons
Dinamic version of the on-screen joysticks
Changing the first screen to be the RC screen while developing this branch
Implementing a sort of returnHandleToCenter function.
Little improvement in the layout.
Implementing the feature of velocity Lock.
Preparing for release 0.11.3
Clean-up
Implementing haptic feedback.
Adding another waypoint enum.
Merge branch 'waypointEditor' into dynamicJoysticks
Removing unused class.
Adding suport to ArduRover.

Uses the rover icon and Modes.
Extracting two methods to the superclass
Fixing the duplicated Drone icon problem.

This happened when switching to a new type of Drone, the old icon wasn't removed.
Merge pull request #206 from arthurbenemann/Rover

This should fix issue #205 by adding the rover icon and modes