save path for custom firmware file dialog between runs
Merge pull request #350 from rh-galaxy/custom_firmware_directory

custom firmware file dialog path saved
Mission Planner 1.2.96
add ability to change text on buttons in servo tab
modify some hud user item decimal places
update mavlink
add compassmot via mavlink
add simplegrid
fix current sensor loading
add bearing to FP tab, for last wp and mouse pos.
fix ft/m issue with rallypoints
add more errorchecking to dflog browse (logs without FMT  messages)
fix mono check box drawing issue in log browse
add hh:mm:ss to mavlink log review data points
tweak df log download over mavlink
add rts/cts to 3dr radio config
add better version detection
fix timeinair counter when playing back log at something other than 1x
update fw historys
remove default setings, moved to frame type
add serial port nice name cache
cleanup udp on 2nd connect
modify gridui to put cam trig distance as part of mission.
add new AS sensor support.
fix a few exceptions
add reboot command to end of terminal
try simplefy pixhawk fw upload.
BG work on joystick
Merge branch 'master' into tracker-accel-speed
quick tweak
Mission Planner 1.2.97
change log browse to virtualmode. much faster on windows
fix for posible future update bug
Merge branch 'master' into tracker-accel-speed