Create v1.4.1 branch.
Update scene visit for axes and legends.
Fix transition bugs (#195, #196).
Fix arc bounds calculation (#193).
Update to latest d3 and topojson.
Update dependencies, add geo.projection package.
Merge pull request #197 from trifacta/v1.4.1

V1.4.1
Merge pull request #1 from trifacta/master

Merge vega