Porting to Skin/ColorSpace classes. WIP.
First pass at formalizing Y.Skin and Y.ColorSpace. Includes some refactoring of app.js.
Add icon images.
Move colorspace.scheme to colorspace.options.
Add slider and table skins.
Remove skin, prefix, and foo fields, and skin-space requirement.
Merge pull request #2 from msweeney/gh-pages

First pass at Y.Skin and Y.ColorSpace formalization