Extremely basic IK based on implementation of the cyclic coordinate descent
algorithm.  Actually seems to work pretty well.
Added left hand/hand rotation setters in preparation for Leap integration.
Place hand based on mouse position, but make sure we don't point above the
shoulders.
Merge branch 'master' of https://github.com/worklist/hifi into ick
Remove unused variables.
Merge pull request #1135 from ey6es/ick

Basic IK/pointing based on mouse cursor with new skeleton.