v0.6

Further refines line charts, allowing them to better handle sparse time series. Adds rug plots and other improvements to scatterplots. Scatterplots can now be linked, least squares works with dates and the encoding options are more robust. All of a scatterplot's components can now be styled.

The Button Layout has also been extended to allow for manual buttons that aren't tied to the data object.

Take a look at the examples for demonstrations of the changes: http://www.metricsgraphicsjs.org