Adds layout support,

* Kills header creation by using formal table view section headers.
* High performance fork (with infinite scrolling with start / end date range heckling, provides 10x – 100x speedup on iPhone 4S; awaiting integration).
* Top-pinning might not work.
* Breaking backwards compatibility.
* Edge insets support is removed. It is better to just inset the whole table view.
* Some properties are removed.
* TSQCalendarCell is removed.
* TSQCalendarMonthHeaderCell : TSQCalendarCell => TSQCalendarMonthHeaderView : UITableViewHeaderFooterView
* Whitespace changes.