Merge pull request #20 from cmcoffin/x_paparazzi

Test commit from Chris
[AggieAir] comment clean up
[AggieAir] UART1 defines
* uart1 defined
* dma channels assigned
* board files updated
* flash mode fixed
* new XGEAR rotorcraft airframe config file
[uart3] fixed typo
[xgear] Fixed typo and event broadcasting
* compiles and runs
* protocol has to be still defined
[xgear] test uart1
Revert "[xgear] test uart1"

This reverts commit e97d0daa4907202d27e770dea33424264a8c5422.
[imu] gx3 with dma subsystem
* use hexarotor_lia_Gx3_rt.xml