hexbin tests: change to a sane baseline
coding_guide: add instructions for running a single test (from Mike D.)
Pass strings to FT2Font -- never Unicode strings.
Fix docstring formatting in imshow.
Axes.hist: remove unnecessary copying of input array.
Axes.autoscale_view: ensure finite ranges; rearrange code for readability
examples/cursor_demo: update to use axhline, axvline
Axes: save "tight" state; margin() default is now tight=True
simpletest_oo.py: remove inactive lines, improve readability
Remove some pre-mpl-0.98 support
