Rename the xy.json file
Merge branch 'master' of https://github.com/lauren-walker/TopicViz.git

Conflicts:
	data/xy.json
Use the xy coords from the top 100 categories to draw each node
Use the first term as the category name in the arc label
Use force layout to move nodes to they dont overlap - first pass
Change some of the settings to cluster the nodes closer
fancier ggvis
Merge branch 'master' of https://github.com/lauren-walker/TopicViz