Add qualitative schemes to colorbrewer.js and colorbrewer.css

Not sure if this was intentional or not, but I tend to favor using the Set1 color scheme for different colors that are qualitative (see http://colorbrewer2.org). It would be good to incorporate the other qualitative schemes as well, including 'Accent', 'Dark2', 'Paired', 'Pastel1', 'Pastel2', 'Set1', 'Set2', and 'Set3'. Is there a reason why these were omitted from the lib package?

I'm happy to add so long as this wasn't an intentional omission.