Version 3.0.0

Tons of new features and improvements!

• Add new properties showsValueKnob, valueKnobColor, and valueKnobSize
  as requested by #97
• Add new continueProgress, pauseProgress, and resetProgress functions which allow fluid continuation
  and pausing of progress animations.
• Add new delegate functions didPauseProgress, and didContinueProgress
• Tons of refactoring and renaming of properties/functionality

Breaking API Changes

Lots please refer to the documentation to get your code up to spec with
version 3.0.0