Fix build problems with new boost library.
Improve MLP learning and MCMC.
Use MarkerDrawAttr in IPlotFactory argument.
Use MarkerDrawAttr in IPlotFactory argument.
Enable marker size configuration.
Move devMcmc to testMcmc in TestMath.
Add Regular2DHistogram class.
Add documentation to Regular2DHistogram class.
Add 2D histogram plots.
Add 2D histogram plots.
Add palette for 2D histograms; viewport constraints in plot.
Add additional palettes.