Add basic data viz support using javascript libraries (d3.js, dc.js, nvd3.js, and more?)

[tmthyjames]

Add ability to build custom, interactive graphs using the best JS libraries using a python interface.

Example syntax (maybe?):

plot.hist(df.desired_column)
plot.box(df.desired_column, groupby='column_to_groupby')
plot.scatter(x='x', y='y', data=df)

[tmthyjames]

add ability to export the javascript code used for building the graph:

graph = plot.box(df.desired_column)
print graph.__javascript_code__