Added optional RSColorPickerViewDelegate methods for more detailed feedback during user interaction.
Replace variable with function call in assertions

Since the height variable is only used inside an NSAssert, and NSAsserts are disabled by default in Release builds, this change prevents four warnings (two standard, two static analysis) against a build.
Merge pull request #39 from rhwood/master

Replace otherwise unused variable with function call in assertions
Merge pull request #37 from vlaminck/master

Additional RSColorPickerViewDelegate methods
Fixes #41
Merge pull request #42 from unixpickle/fix-slider

Update sliders to fix #41. The default sliders should not be used in custom apps and are meant as examples to show how the color picker could be used.
updated places which used contexts
Merge pull request #43 from unixpickle/unified-contexts

Swap custom context function for `CGContextCreator`.
removed sliders from README
Merge pull request #44 from unixpickle/fix-slider

Remove sliders from README
fixed up indentation
standardized pointer syntax
standardized method+function syntax
added contributing section to README
standardized RSSelectionView
cleaned up RSGenerateOperation
demo look less bad on iOS 7
updated to be state-based
state is now based off unit-circle coordinates
more consistent metrics