Refactor with backbone

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
Demo plotting operational

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
Updated d3.js to v3

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
Updated to max 10 clusters

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
Renamed DOM elements for consistency

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
Multi-plot pie nodes, mean clusters working

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
File upload now functional

Signed-off-by: Joseph Lee <josephl@cecs.pdx.edu>
Updated links, readme