Draw widget no longer initialized black.
New
 - MrPlot is no longer a wrapper for mraPlot or cgPlot
 - Draw error bars on line plots
 - BracketRHS and print overloading for Mr_Window

Updates
 - Graphics example programs renamed from *_examples to examples_*
 - Windows can now be named
 - Data objects are identified by subclassing 'MrGrDataAtom'

Bug Fixes
 - Overplotting works