Added a border line around range plot area fills. Fixed issue #63.
Updated CPTRangePlot to always draw every bar when using an area fill. Fixed issue #61.
Added plot area delegate methods to report user interaction with the plot area. Fixed issue #48.
Added some usage examples for the new plot area delegate methods.
Documentation update.
Added some plot area delegates in the Plot Gallery.
Changed the plot area -pointingDeviceDownEvent:atPoint: method to not block the responder chain after calling the delegate.
Fixed a bad date calculation in the StockPlot example app. Fixed issue #67.