launchpad-control-0.0.1.0: High and low-level interface to the Novation Launchpad midi controller.

High and low-level interface to the Novation Launchpad midi controller. Allows to make Launchpad apps easily, or to access the controller in a more low-level way. Some example apps are included. Presently only Mac OSX and Windows is supported (because we rely on hmidi).