[airframe] Added exapmle Bumblebee Lisa/M 2.0 frame as promissed on Hak5...

Please consider merging this change. This airframe file is the one used on the show:
http://youtu.be/wBW7XXn_Bok?list=PLOF903IIpqjNs8epO-3DtIHHdNEnqu2TY

Should make bring-up of a "default" airframe easier.
Add a comment to tell that it should be changed to your local magnetic field values ?