Changes to compiler now produces an error o = o. Changes the noop handling for ARC-enabled projects.

Update README with new properties

Add filling of area below the line in the chart

Fix display of first point

Refactor helper functions

Update documentation for drawPoints method

Add ellipses drawn at each data point

Upgrade Xcode project

Move ARC macros to CKSparkline.h to retain consistent installation/usage with previous versions

Fix whitespace issue

Refactor setData to treat computedData as its own concern and general cleanup

Rephrase section of README

Remove non-ARC release call from README example

Update .gitignore with Xcode per-user project settings directories

Add conditional ARC support and migrate the example project to use ARC