BoardLEDs: all leds off during init
BattMonitor: add @Increment to CAPACITY description
Plane: add @Increment to battery failsafe descriptions
Copter: add @Increment to battery failsafe descriptions
Copter: add ANGLE_RATE_MAX param

Limits the maximum rotation rate requested by the angle controller which
is used in stabilize, loiter, rtl and auto flight modes
AP_Airspeed: fixed I2C semaphore handling for I2C airspeed

this affects MS4525DO on APM2
Copter: crash checker

Crash is determined to have happened when the copter is 20deg more than
the ANGLE_MAX parameter continuously for more than 2 seconds
Not activated when in ACRO mode or while flipping
Copter: add alt and throttle checks to crash detector
Copter: remove some commented out send_text code
Copter: correct @Range of MOT_TCRV_MAXPCT parameter
Copter: disable some aux channels on hexa and octas

Resolves issue #324
RC_Channel: formatting
Copter: rc10, rc11 available even without MOUNT
Copter: default Ch7 to DO_NOTHING

Ch7/Ch8 Save_WP feature triggers when switch is brought high (instead of
low) to be consistent with other aux features
Copter: more Ch7/Ch8 event logging

Additional event logging for SaveWP, Fence, Acro trainer, Save Trim
Copter: recalc distance to home during arming

fixes an rare edge case in which the fence could trigger immediately
after arming
Copter: disable autotune if pilot moves yaw stick
Copter: arming check that throttle is above failsafe
Copter: int gyros on arm, not on first boot

this makes first boot much faster
PX4: changed startup to fail if no px4io on FMUv2