This is a safety-related bug fix to the 20150922 release

This release fixes two arming related bugs:

• Vehicles could inadvertently arm if switch arming was selected and no arming switch was configured.
• If an arming command was sent while the vehicle was unable to arm because of alarms, the vehicle could arm later when the alarms clear.

This release also contains fixes that improve the reliability of OpenLRS control communications when using a Sparky2 or RevoMini flight controller with native OpenLRS.

Known Bugs/Bugfixes

• For OpenLRS the battery voltage was incorrectly displayed. You can use this firmware to fix this on Sparky2 / BrushedSparky