fixed :display: for images so that you can know specify a id,extension,dpi format for the displayed image
Changes to Plotter.GalleryPlot so that excess space around the plot is removed
changed code so that argv is not passed to main - main definition does not recieve argv and so an error was thrown
more space saving around gallary plot images
test.py - draw r-ggplot from commandline
merged with Ian's changes
merged with IanSudbery-fix_display_option