Added the ability to set the digital relays on the APM
Merge branch 'master' into enable_set_relay
Updated SLUGS message definitions to work with current version.
Allow compiling on Visual Studio 2012 and earlier.
mavflightmodes: Print a summary of time spent in each mode.
mavkml style fix
common.xml: Added GPS_RTK and GPS2_RTK
force all structs to be packed
Corrected XML for new MAV_DISTANCE_SENSOR message
Merge pull request #197 from Susurrus/distance

Corrected XML for new MAV_DISTANCE_SENSOR message
Expanded the output of mavloss.py to include reasons why packets were lost.
Merge pull request #195 from mavlink/packed_structs

Force all structs to be packed
Document custom mode field
pymavlink: support .log files in mavmission.py
ardupilot: merge camera messages from Andrew Chapman
mavkml: more colors
ATTITUDE_SETPOINT_EXTERNAL message
LOCAL_NED_POSITION_SETPOINT_EXTERNAL message
GLOBAL_POSITION_SETPOINT_EXTERNAL_INT message
extended enum MAV_FRAME