Added additional example
Merge pull request #203 from PX4/debug_example

Added additional debug / uORB example
Merge remote-tracking branch 'upstream/master' into px4io-i2c
corrected some wrong units (used in airspeed calculation)
Hotfix: Add support for 9-channel Spektrum/DSM setups.

Tested by Felipe Reis <felipereis87@gmail.com>
Out of memory warning, flash and RAM optimizations
Merge branch 'master' of github.com:PX4/Firmware into px4io-i2c
Disabled MAVLink debug app
Kill off a couple of files that should never have been checked in.
Simplify the PX4IO main loop to cut down on memory consumption.
Don't try to print the idle stack usage (we need to fix it up before the code can be adapted to measure it).
more fixes for the airspeed readout
Hotfix: discard NUL characters in readline, rather than faking EOF on the console.
Hotfix: discard NUL characters in readline, rather than faking EOF on the console.
Removed 1 Hz output
Merge branch 'px4io-i2c-memory-squeeze' of github.com:PX4/Firmware into px4io-i2c-memory-squeeze
working on better status reporting, removed unneeded fake PWM generation from FMU
Add an interrupt-safe way of comparing a timestamp with the current time.
Add an interrupt-safe way of storing the current time into a timestamp.
Use hrt_elapsed_time() in cases where we can't be sure the timestamp won't change under us.
Merge branch 'px4io-i2c-memory-squeeze' of https://github.com/PX4/Firmware into px4io-i2c-memory-squeeze