Move 3rd-party JavaScripts into js/lib
Improve comment (yay, artist-mode!)
Switch to a pure SVG graph renderer

Since we don't care about browsers that don't support SVG (e.g. IE),
we can use something a bit smaller and SVG-specific.
Pull chart colours into CSS
Reverse classname ordering
Separate data extraction and transformation steps
Refactor charts into classes

This allows SVG rendering to be deferred until the chart is inserted
into the DOM, which ensures the SVG renderer has all required context
for rendering.

(Firefox throws an error when rendering is attempted before the chart
is inserted into the DOM. See
https://bugzilla.mozilla.org/show_bug.cgi?id=612118)
Pull chart JS into separate file
Merge pull request #15 from 99designs/simplify-svg

Simplified chart rendering