FIXED: output file did not generated under the current working dir
FIXED: a commit does not have change set

A commit from AOSP base made parse error. Check the commit if you
want to see.

50afbb308db9cb511f48f4ce8437dd96ece0faba
http://goo.gl/81uzNq
generate json file to be loaded by d3
don't update files under .idea
show group
Initial visualization based on better force layout node selection

This is the initial visualization based on better force layout
notde selection from couchand's block #6420534

http://bl.ocks.org/couchand/6495846

Each color shows different company and each vertex represents
each developer.