(re-commit) Added support for Leap finger-sensing device.
Note that the actual Leap SDK can't be in the repo for IP reasons, so there's a stub-version of the header. When the actual SDK is put into the Leap folder, cake will find it automatically and switch over.
Merge pull request #589 from machinelevel/dev

(re-commit) Added support for Leap finger-sensing device.
fix the default orientation for an injector
Merge pull request #590 from birarda/voxel-noise

fix the default quaternion for audio injectors