Google Play Services library update.
Using new setIcon method to change the drone marker icon.
GUI: Starting to extract all dronemarker methods to a new class
GUI: fixing some problems with the DroneMarker class.
GUI: Removing some code duplication on the DroneMarker Class
Merge branch 'master' into newMaps
Changes to get it run in my dev enviroment
Smoothed Launcher Icon
Issue129 Implemented volume control on Phones
Refactoring commom code to supertype.
add AntiAlias to the pitch scale
Added option to keep the screen bright
Stub for the Portuguese Translation
Update strings.xml
Merge pull request #140 from fpvcuritiba/Portuguese_Translation

Translated to Portuguese-BR
Merge pull request #139 from arthurbenemann/Portuguese_Translation

Portuguese Translation
Reverting a change made by @realbuxtehuder to the MAPS API key
Merge branch 'master' of https://github.com/arthurbenemann/droidplanner.git
Merge pull request #131 from realbuxtehuder/SmoothLauncherIcon

Smooth launcher icon
Merge pull request #136 from realbuxtehuder/HUDLayout

Minor graphic improvement for the HUD