Get latest D3 and TopoJson

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Refactor resizing.

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Add zooming by double click.

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>
Merge remote-tracking branch 'remotes/origin/LatestD3Topo' into gh-pages
Merge branch 'ResizeWidget' into gh-pages
Merge branch 'ChoroZoom' into gh-pages