+ added alternative PID controller from http://www.multiwii.com/forum/viewtopic.php?f=8&t=3671
+ this is a per-profile setting, and PIDs CHANGE from default multiwii ones. check the above forum post for PID examples. set pid_controller = 0 for default multiwii, or 1 for new one.
= went back to clearing clibuffer after each command


git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@341 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61