Resource view for fullcalendar 2.1

Long waited resource view implementation, now for fullcalendar 2.1 and based on @seankenny work.

Merge it, compile it with grunt, and open `demos/resource-views.html` to see it working.
There is also a fixed columns width version at `demos/resource-fixed-views.html` (cannot be run locally), but this one is just a guide of how you can implement it by yourself on your installation.