AUI-983 - ColorPickerBase doesn't display properly

If more than one node is set as trigger, ColorPicker does not
display properly.
Add example of using ButtonGroup with orientation
AUI-986 Fix toolbar to take A.ToggleButton as a child
AUI-986 Update demo
AUI-988 Toolbar should render the children when Toolbar itself is rendered
AUI-988 Update demo
Add .jshintrc configuration
Allow dangling _ in variables
AUI-992 Focus Invalid field method on Form Validator does not show the user where the field is
Add API Docs placeholder for TimePicker
Add API Docs placeholder for DatePicker
Add API Docs placeholder for DatePickerPopover
Add API Docs placeholder for DatePickerNative
Add API Docs placeholder for DatePickerDelegate
AUI-994 Number regex accepts wrong values
AUI-994 Source formatting
Add Audio play/pause/load methods
Add demo for Audio play/pause/load methods
Source formatting
Linting