Switch to Hammer.js for mouse and touch event handling
2nd pass and fix test description
update hammer dependency to bug fix version, fix keyActions being an array and tweak/add tests for InputManager, MouseAction, and TouchAction
test volo with updated zip dependency
fix the demo as per luis suggestion
Merge pull request #108 from iceddev/hammer

Hammer integration - closes #30, closes #69, closes #102
implemented contact listener class
fix lodash dep, and update volo
Merge branch 'box2d_fixes' into flipImage