Document row chart's xAxis()

fixes #536
Added time scale boxplot example
Boxplot now keys data so that transitions make sense
Keep the spec runner around so `grunt test` does not break `grunt server`
Pull D3 version back up to 3.4.3
Update CONTRIBUTING.md with `npm update` and new baseline regen
fix link
added fixedBarHeight to row-chart.  Added jasmin test
Merge pull request #486
artifacts for #486
fix some tests broken by updated d3.js

fixes #550
Do not attempt to connect to opensauce for external pull requests
Fixes bug 551
Merge pull request #562
merge #562

Thanks @mtraynham!
cut duplicate of function

fixed #571
Make moveChart a bar chart