beginnings of cli editing support by cehteh; (still buggy)
added and began work on integrating failsafe_detect_threshold
got rid of acc_lpf_for_velocity since that seemed no longer used.


git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@317 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61