adding work from Nick
adding updates from Emily
fix whitespace issues
merge gh-pages
Make all the js libraries local

This makes developing much faster, and should also help make
sure the visualization stays up if one of the multiple remote
servers we're downloading js from goes down.

In particular, I found it took a long time for files to download
from the d3.js site.
Add Legend

This commit adds an auto-updating legend to the map.

It removes the requirement of having user defined jenks for each
field, using the simply statistics library to calculate these
automatically.

We likely want to style and position this differently,
but that decision can be made by the visual designers.
Merge pull request #35 from Solomon/add_legend

Add legend