Graphing: Fix so sort checkboxes are all checked by default
Graphing: Fix #548, string messages having trailing zeros
PFD: Added checks inside setActiveUAS to check if UasObjects are valid before using them
MAVLINK: Rename MAV_COMP_ID_AUTOPILOT to MAV_COMP_ID_PRIMARY

As MAVLINK is a symmetrical protocol, rename define to reflect that the GCS also has the concept of a ‘primary’ component in the system
MAVLink: Update to new version 2014/12/15
MAVLink: Remove deprecated messages
Serial Connection: Improvement to react to USB cable disconnection
Param Widget: Fix crash if setParameter called when no parameter list for component exists.
APM Toolbar: Improve Tab highlighting and selection