Rewritting the ApmModes Enum.
Moving all mode funcionality to the Apmmode enum.
Imnplementing diferent flight modes for diferent types of Drones.
Load the correct icon on the map.
Merge pull request #64 from arthurbenemann/Modes

Modes for ArduCopter
HUD layout improvements to suport multiple screen sizes and densities.

Better placement of the text idicators and using percent of screen to define the scrollers widths.
Merge pull request #70 from arthurbenemann/HUD_layout

HUD layout improvements to suport multiple screen sizes and densities.
Preparing for release v0.7.0