Make conf.py work with py3
Make gen_rst behave with py3
Make plot_directive py3 friendly
Make make.py build docs under python 3
Make call to raise py3 compatible
Fix py2/3 unicode differences
Simple 2to3 on gen_gallery.py
Make md5 take byte as argument, not string
Fixes problem raised in #1431
Fix Python 3 bug in PS backend.
Another Python3 bytes/unicode fix
Flush file handles at the end, since Python 3 won't do it for us.
Re-write stacked step histogram
Fix bug in stacked bar histogram. Also, calling hist with `log=True` now
behaves correctly in all cases.
Update a few test baseline images
PEP8 fixes
Remove duplicate test_hist_offset
Merge pull request #1779 from mdboom/ps/python3

Bug in postscript backend in Python 3
Merge pull request #1790 from pelson/set_transform_on_artist

Fixes problem raised in #1431 (```get_transform``` should not affect ```is_transform_set```)
Merge pull request #1724 from neggert/hist_stack_round2

Re-write stacked step histogram