Original MultiWii v2.2 software

Original source from http://code.google.com/p/multiwii/
MultiWii branched from dev release R1539 dated 2013-07-15
MultiWiiConf branched from official release v2.2 dated 2013-03-11
Configured MultiWii for GY_80 10DOF

Basic config to get MultiWii working with the GY_80 10DOF module. Also
added new references to MultiWiiConf to support Processing 2.x
Added MultiWii support for HCSR04 sonar

Some core changes to support the HCSR04 ultrasonic module