fixed bugs in rotation matrices. default orientation is now "Components up pins forward".
Added simple (but not perfect) method of figuring out offsets to APM_Compass_test.pde
git-svn-id: https://arducopter.googlecode.com/svn/trunk@666 f9c3cf11-9bcb-44bc-f272-b75c42450872
also added 45 deg angles to orientation matrices to allow more flexibility in mounting the compass to the APM frame.
git-svn-id: https://arducopter.googlecode.com/svn/trunk@565 f9c3cf11-9bcb-44bc-f272-b75c42450872