Changed the CPTGraph legend property to use the synthesized getter. Fixed issue #50.
Add an ellipsis at the end of all truncated text. Fixed issue #49.
Fixed building for iOS6.x.

This would build for iOS7 but not for iOS6.
Fixed a bug in the automatic labeling method that could cause an application hang with very small axis ranges. Fixed issue #52.
Changed some view coordinate calculations to use NSDecimal throughout to reduce rounding errors that occurred with very small plot ranges.
Merge branch 'fixes-to-push' of https://github.com/bignerdranch/core-plot into bignerdranch-fixes-to-push
Added back the run-time check when using the iOS 7 SDK since the app could be running on an earlier system version that doesn't have the new method.
Fixed a coordinate conversion bug when collapsing layers on iOS. Fixed issue #55.
Increased the text layer margin to compensate for an iOS 7 size calculation issue. Fixed issue #57.
Updated the NSDecimal conversion functions to use string conversions rather than -[NSNumber decimalValue] for better performance.
Replaced calls to the NSColor CGColor property which is unavailable before Mac OS X 10.8. Fixed issue #58.
Added some range checks to the function datasource. Fixed issue #60.
Fixed the function datasource so it will return data even if the plot is added to the graph before setting the datasource. Fixed issue #59.
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.