Added NSDate+JDFToolkit.
Added Static Library target.
Added some comparison methods.
Added some more comparison methods that ignore the time portion of the date.
Added footer property. Also added some convenience methods for populating rows with JDFTableItems.
Added a value property. Changed JDFCellType.
Added JDFDateFormatterCache.
JDFDateFormatterCache is now a singleton. Added some dateFormatters (read-only properties).