build update to 2.11.0-RC3
provides RichPlot module

This is the first step to unify and simplify the API around plot.

- enriched category and xy plot which provide domain and range objects
  to manipulate the axis labels and the markers
- Marking module now contains only the Marker converters
- removed MarkerSpec
- added PlotSpec
removes traits DomainAxis and RangeAxis

Removes the traits DomainAxis and RangeAxis in favor of the new RichPlot
API. This also removes the ability to get/set labels from the generic
rich chart, instead, there are now also enriched FastScatterPlot and
ThermometerPlot classes, ContourPlot is dropped since it is deprecated.
introduces and uses Axis class
lots of scaladoc improvements