Use InvenSense code to handle the rather complicated business of talking the
sensor into giving us the compass reading.  We're getting it now, but I still
have to figure out how to incorporate it.
Basic compass fusion.
Merge branch 'master' of https://github.com/worklist/hifi into kinected
No clock_gettime on OS X; must use gettimeofday.
Removed unused variables, added motion driver library for OS X.
Ryan likes the eyelids starting at forty degrees.
Flush the queue so that we don't get any funny data on the initial read.
Merge branch 'master' of https://github.com/worklist/hifi into kinected
Merge branch 'master' of https://github.com/worklist/hifi into kinected
Merge pull request #639 from ey6es/kinected

Linux support and compass fusion for gyros.  With special bonus upper eyelid lowering a la Ryan.