Removing all accented chars from the french translation.

The accents may be causing some problems, so for now it's best to have a orthographic errors then a crashing app.

Take a look at  issue #245 for more info.
Cleaning up the devices filter.

Removing duplicated value, fixing comments, moving unknow device to the botton.
Hungarian translation.
Merge pull request #249 from andrask/master

Hungarian translation.
Change project target to the new android API (18)
Preparing for release v0.12.3
Switch to the RC screen while on this branch
Removing the velocity lock feature.
Merge pull request #251 from arthurbenemann/USB_devices

Cleaning up the devices filter.
Merge pull request #253 from arthurbenemann/issue245

Removing all accented chars from the french translation. Look at #245 for more info.
Quick bug fix for issue #256
Merge pull request #258 from arthurbenemann/BugFix_issue256

Quick bug fix for issue #256
Adding the GPLv3 license
Merge pull request #250 from arthurbenemann/RemovingVelocityLock

Removing velocity lock feature
Preparing for release v0.12.4
Changing back to the FlightData as the main screen
Preparing for release v0.12.4b
Making the distinction between SDcard and assets files.
Making the CameraInfoLoader work for files in the assets folder
Refactoring the CameraInfoLoader class