dc_massdrive test 1

Playing with D3/crossfilter/dc using the massdrive dataset
Revert "dc_massdrive test 1"

This reverts commit f56e8cef81af05c6520b8c8108b2f4a98dafa43a.
Finished adding initial files
Merge https://github.com/mass-datathon-cornish-rex/UI