Core gesture handling module

[jelbourn]

• Research existing gesture libraries (polymer, hammer, etc.)
• Propose approach
• Define gesture vocabulary (swipe, pan, tap, drag, etc.)
• Solidify path forward with hammer (alpha.2) (Tap fired twice in Chrome when using touch on Windows 8.1 / 10 hammerjs/hammer.js#917)
• Support for devices with touch and mouse (alpha.3)
• Create / modify Angular event plugin on top of module (alpha.3)
• Ensure "drag" recognizer doesn't overwrite "pan"

[jelbourn]

Research is done. Moving issue to next milestone for execution.

[jelbourn]

Moving to alpha.3 for completion of final parts

[jelbourn]

@kara closing this as done.