mavlinkinterface: trigger camera only once. #731
firmwarehistory: update
flightdata: move tfr to its own layer
update Simplified Chinese translation
Update ParameterMetaDataRepository.cs

Now it can load the elements the Chinese xml doesn't exist.
Add Flight Mode 16
Merge pull request #721 from virtualrobotix/for_merge

Some modification for VRBRAIN 4 and 5 boards.
Support for TetraCAM Time offset Geotagging

TetraCAM Pixel Wrench does not embed the DateTimeOriginal (0x9003) meta
tag, it uses instead DateTimeDigitized (0x9004). This change will look
for that tag if the DateTimeOriginal Tag is not found.
TFR: allow enable/disable of tfrs
mavcmd: update to display do_land_start
georef: fix field reverse #727
configaccelplace: add warning about only doing 1 of the 2 calibs
winddir: autoscale max speed
flightplanner: turn on autosize on all coloums
thememanager: fix alternate row colour on other themes
mavcmd: update loiter_turns
tfr: fix crossthread call on load
MeasureString: add null check
ElevationGraph: add terrain follow