This is the second bugfix release of the 0.54 series
Here's the CHANGELOG
* Rewrote ft2font using CXX as part of general memory leak fixes;
also fixed transform memory leaks
* Fixed several problems with log ticks and scaling
* Fixed width/height issues for images
* Fixed draw_if_interactive bug for semilogx;
* Fixed text clipping to clip to axes
* Fixed leading newline text and multiple newline text
* Fixed plot_date to return lines
* Fixed plot to work with x or y having shape N,1 or 1,N
* Added renderer markeredgewidth attribute of Line2D.
* Fixed tick label clipping to work with navigation.
* Added renderer grouping commands to support groups in
SVG/PS.
* Fixed, this time I really mean it, the singleton plot
plot([0]) scaling bug; Fixed Flavio's shape = N,1 bug
* added colorbar
* Made some changes to the matplotlib.colors.Colormap to
propertly support clim
http://sourceforge.net/project/showfiles.php?group_id=80706&package_id=82474&release_id=244568