Knockout custom bindings for Hammer.js multi-touch gestures library
knockout (https://github.com/SteveSanderson/knockout) hammer.js (https://github.com/EightMedia/hammer.js)
Usage: data-bind="hmHold: holdHandlerFn, hmOptions: { hold_timeout: 400 }"
TODO: ?? Use jQuery hammer.js plugin for IE support TODO: ?? Refactor to -> data-bind="hmEvent: { hold: holdHandlerFn }, hmOptions: { hold_timeout: 400 }"