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.
Properly passing on horiz-/vertOn to Cursor()

Simple fix to properly pass on the horizOn and vertOn keyword
arguments to the matplotlib.widgets.Cursor constructor.
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
Make Axes.stem take at least one argument.

When it takes only one, the abscissae default to np.arange(len(y))
Add axes.stem call signature test
Update CHANGELOG with axes.stem change
Improve empty collection check in add_collection.
use QMainWindow.closeEvent for close events

The current code uses the QWidget.destroyed signal
to emit a close event into matplotlib. This is a very
bad idea, as it is a heavy abuse of Qt functionality.

When a main window is closed in Qt, it and its children
are deleted if the DeleteOnClose flag is set (which we
did set). This causes the QWidget.destroyed signal to be
called. Setting the DeleteOnClose flag is a very bad
idea, since objects should only be deleted by the
garbage collector. Soon after, PyQt4 will complain
that "the underlying C++ object has been deleted", since
the object is alive for python but dead for C++.

This patch changes the machinery to use the
QMainWindow.closeEvent to emit a close_event, which is
what one actually wants.
Add test for add_collection
Fix positional argument parsing