Initial support for status info

Initial support for status-messages from mavlink to opten-tx. Parsing
arm/prearm-messages and displaying them for two seconds instead of
consumption on telem1.
Additional status messages
Sound for autotune
Sounds Added for Error Categories

Male voice to distinguish for current female voices
Comments about SensorID issue
Initial steps to attitude reporting

Added initial code to report attitude reporting
Commented the code and removed some old comments
Some Mavlink messages added but inactive.
More warning messages.
Added comments.
Moved location of bitmaps.

I hade some issues with open-tx when the bitmap's was placed in the root
bmp-folder. It seems like reading the images from there were really
slow, and the sounds started to stutter every time the telemetry screen
was on. Moved as a temporary meassure.
Merge pull request #11 from lvale/Arducopter-Position

Arducopter position
Merge pull request #7 from chsw/master

Pull from chsw/MavLink_FrSkySPort