Add support for V for quads with offset arms such as the TBS and SteadiDrone QU4D
Add a mixer file for the V quad
Update the makefile to include the new mixer config.
Update the quad V values.
Merge pull request #253 from sjwilks/quad_xv_mode

Add support for quads with offset arms such as the TBS Discovery
Merge branch 'master' into export-build
Clean up some script trash and update scripts.