Adding ID's with color names so they're linkable

This adds ID's with the color names to the respective `div`s.

This way the colors are __a)__ shareable and __b)__ usable in tools like [Alfred](http://www.alfredapp.com/) (sadly Mac only) or [Launchy](http://www.launchy.net/).

How is that useful? Let's say you remember a couple of CSS names and want to use _the new defaults_. You open Alfred/Launchy, type `color orange` and hit enter. A new tab with the URL `http://clrs.cc/#orange` is opened.

The related snippets would be `http://clrs.cc/#{query}` for Alfred or `http://clrs.cc/#%1` for Launchy.