use local copy of d3.v3
Merge remote-tracking branch 'ben/gh-pages' into gh-pages
dded addneighbor function
use local copy of d3.v3
return result!
formatting cleanup
make get_neighbors more resilient

d3 mutates the links data - it changes the node id to the node object
so get_neighbors didn't work before that happened.

also there's some example mouseover/out/click stuff in here