Started adding polyfill functionality
Started adding better testing
Reorganized example directory

Example now matches package layout conventions
Updated polyfilled elements are resized.
Added polyfill example.

Moved color_picker example to its own directory.
ColorValue.from() constructor throws ArgumentError

* Corrected constructor to throw proper ArgumentError instead of an exception
Added ColorValue.toHex()
Fixed bug in toHex so smaller values are 0 padded
Added pop-up element for color picker.

* Color picker appears onFocus
* Removed onMouseLeave.
* Fills value with hexcode of color and alters background