leap: first implementation of LeapFinger, inspired from LeapMotion by thomas
Merge branch 'refs/heads/input-leapfinger'
fixes for latest leap sdk version

specifically version 1.08
fixed error when closing application

By adding a listener for exit and doing absolutely nothing in it. But it works
pos3d profile and z position
normalized z for leap
Merge branch 'master' of https://github.com/kivy/kivy
Merge pull request #1489 from karlsander/master

leap motion input provider