[RobAStBase] 
+ qqplot: some speedup in examples
+ wrapper functions ICPlot, InfoPlot, and ComparePlot use refined grids, i.e.,
  the grids are plotted on user given coordinates (or rescaled coordinates)


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@782 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
+ new helper function cutoff.quant() to produce cutoff from model quantiles


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robast@783 edb9625f-4e0d-4859-8d74-9fd3b1da38cb