Calendar: added API hooks to provide additional flexibility in dynamically styling days; added demo of using API hooks to manage event data
tweaked calendar datetap logic to exclude cases where a multi drag paint happens to end at the same starting date; renamed noToggle to disableUiToggle; jshinting datepicker
Calendar: added flagging logic to catch incorrectly recursive customRenderFn's and throw a readable error instead of crashing the page
Fully fleshed out x-calendar documentation. Woooo.