Release 0.2.0

Enhancements

• [MDCButton] Component added. Randall Li, Adrian Secord
• [MDCSlider] Add support for interface builder to MDCSlider. Ian Gordon
• [MDCFlexibleHeader] Add contentView and custom shadow layers. Junius Gunaratne
• [MDCSwitch] Autolayout demo app. Ian Gordon
• [MDCFlexibleHeader] Component added. Jeff Verkoeyen
• [Catalog] Add "catalog by convention" experiment. Jeff Verkoeyen
• [MDCSwitch] Switch from IBInspectable to UI_APPEARANCE_SELECTOR. Ian Gordon

Bug Fixes

• [CocoaPods] Remove private_header_files from podspec. Jeff Verkoeyen
• [Pesto] Fixes to Pesto example app. Junius Gunaratne
• [MDCInk] Update background opacity timing to match web implementation of ink. Junius Gunaratne
• [MDCInk] Darken default ink to 12% opacity. Adrian Secord
• [MDCInk] Make sure completion block is fired after ink animation completes Junius Gunaratne