Start to update docs for spectral/Spectral change
change spectral to nipy_spectral, leave spectral as alias, update docs
align nipy_spectral_data, double backquotes
Add dateutil kwargs to csv2rec

Fixes ambiguous date problems between US/UK date conventions.
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
Fix #1615 -- offset is empty.
Remove broken printing_in_wx.py example.

It shows a preview, but writes blank files.  The wx printer
support has been deprecated for more than 2 years.
Make loc come after fontdict in set_title. Closes #1759
axes3d's set_title sould return the Text object
Merge pull request #1756 from efiring/del_wx_print_example

Remove broken printing_in_wx.py example.
Also needed to swap the arguments in docstring
added test of 'bottom' kwarg in `hist`
fix of issue #1763

The `bottom` that needs to be passed to bar or barh got lost kwarg got
lost in the histogram refactoring.