development: Added SearchBar delegation methods for when text changes and for when the text has been cleared.

development: added convenience CALayer backgroundColor property called bgColor to avoid dealing with cgColor

development: Updated the TextField example project to reflect PR 544. Added contentEdgeInsets to Divider.

Fix placeholder placement when using left view in textfield.

development: updated MaterialGravity to Gravity and updated SnackbarController API with HeightPreset

development: updated ToolbarController, SearchNarController, NavigationBarController, and Bar types to adjust for HeightPreset

development: initial addition of CaptureController, updated default tint and title color to match pulse, added Display class

storyboard-examples: updated Switch and fixed an issue where Switch in a Bar or NavigationBar would behave incorrectly, issue-540