Comm: possible fix for intermittent crash

- Unmatches NSNotifcations registrations and
  timing possibly causing missing selector crash
  when you cancle the radio config and teardown/start
  telemetry
Auto build: Bump version to v1.0-beta.21
Added Black Raccoon FTP library
Added functionality to FTP a file to the ardrone
Added Asysnc Socket library. Created telClicked action that telnets on to the drone and extracts and executes the ser2udp program.
made it so gunzip overwrites any old file as needed.
Added buttons and functions to make the AR.Drone take off and land.
Correct modes for ARDrone2

The ARDrone2 does not use the custom modes field in the heartbeat like the Ardupilot does.  Instead it uses the system_status field.  This addition simply enumerates the system status using the system_modes if it detects a MAV_AUTOPILOT_GENERIC which is what the ARDrone enumerates as.
added function for Return to Launch
added  function to support spectrum pairing
fixed specClicked button action name
added ardrone specific utilities
Fix rebase conflicts
Added functions to support ArDrone Commands
Added more animantion functions.  Refactored some of the function names in hopes they are more clear.
Added the rest of the ArDrone Animations
Implemented updates from the review
Added license informaiton for BlackRacoon and CocoaAsyncSocket libraries
Merge pull request #98 from fightingwalrus/igcs-136-ardrone-ftp

Igcs 136 ardrone ftp
Added AT specific functions to support the Ar.Drone