archlinux compatibility
New tone_alarm driver, now features GWBasic PLAY / ANSI music string format
Add support for arbitrary user tunes on the commandline.
Add one more tune. Improve error handling. Be less picky about tunes passed on the command-line.
One more tune. Might be a bit big to keep.
more constness
Merge branch 'master' of https://github.com/PX4/Firmware into archlinux
Fix a typo in several of the basic alarm beep tones.
Adjust audio pattern numbers.
Silence the tone for pauses in legato tunes. Some tunes sound better now.

Add new, distinctive error/notification tones.

Reduce the amount of data space consumed by the largest tune.
Merge pull request #220 from PX4/tone_alarm_PLAY

New tone_alarm driver that uses ANSI music / GWBasic PLAY strings
Adjust the syntax of the 'pwm' command to make it easier to use.
Silence MS5611 driver, the perf command still captures the error count / rate. Unfortunately this is necessary as general users are concerned about something that is (at a reasonable rate) not actual safety critical.
Merge pull request #228 from PX4/ms5611_silencing

Silence MS5611 driver, the perf command still captures the error count /...
HOTFIX: Adjust the FMU update rate adaption logic to avoid constant debug message spew when not in a PWM mode.

Fixes #229
Merge pull request #230 from PX4/pwm-syntax-fix

Adjust the syntax of the 'pwm' command to make it easier to use.
Merge pull request #218 from thomasgubler/archlinux

archlinux compatibility
Hotfix: Roll back an attempt to let the system know we want Python 2. Its better to make the uploader Python 3 compatible
Merge remote-tracking branch 'upstream/master'