added nolegend patch for errorbars
New demo showing multiple images with common cmap, colorbar.
Added order of magnitude and offset string to colorbar axis tick labelling.
updates for new colorbar
fixes for new colorbar
Let ticks kw work consistently for contour.
Fixed format kwarg bug found by Jeff Whitaker.
fixes for new colorbar.py
Make colorbar calls compatible with Eric's new colorbar.py
