KWStepper Versions Save

• Ensures the correct delegate methods and callbacks are executed when clamping.
• Adds tests for decrementing / incrementing and callbacks.
• Clarifies how the wraps property works in the documentation.

Adds documentation and makes decrement / increment buttons public.

Passes KWStepper object to callbacks.

Fixes support for CocoaPods dependency manager.

Cleans up formatting and syntax.

Adds support for callbacks.

Uses implicit references to self.

As best practice, this version makes the decrement and increment buttons immutable.