Merge pull request #500 from virtualrobotix/for_merge

Added filter *.vrx for to find VirtualRobotix's firmwares from "Load custom firmware" utility
remove elevation graph limit
prep new battery sensor
create log dir on startup
prep for dual mag calib
Fix for non DTR, RTS bluetooth radios

Currently connection via DTR, RTS disabled BT modules is almost
impossible. This is happening due to resetting DTR line which makes the
connection impossible on some modules.

To use this fix please also add following line to your config.xml:
<CHK_resetapmonconnect>false</CHK_resetapmonconnect>
droneshare to https
fix pid sync if the differ from the start
Merge pull request #509 from FenomPL/master

Fix for non DTR, RTS bluetooth radios
impl of Joystick dispose
Joystick dispose() pattern impl

Signed-off-by: Michael Oborne <meee146@gmail.com>
add mapbox test map
fix joystick compile error
change motor number to letters
fix hil issues
undo zedgraph fix, as it breaks others
change point camera here to use ROI
update gridv2 - slider
add red area to airports
fix log analyser on non bins
fix antenna tracker alt.