matplotlib Code

cbook: handle empty string returned by locale.getpreferredencoding
Reported by Huziy Oleksandr.

[3015614] give examples/api/font_file.py a fighting chance on Linux and Win

numpy version check: make it more readable

[1474254] getp, setp: minor clarifications

[1467533] pie shadows are tagged with _nolabel_

[2922266] pyplot_tutorial.rst: remove tabs from code (patch by Ori Avtalion)

[2922387] axis.py: docstring fix by Ori Avtalion

remade filesave icon bitmapped files from filesave.svg

[2924597] coding_guide.rst: refer to memleak_hawaii3.py

[3015013] use atexit in _pylab_helpers to ensure orderly shutdown.

It closes all windows; in the case of Tk, this calls the root.destroy()
function, which should prevent the PyEval_RestoreThread error on Win. See
http://mail.python.org/pipermail/python-bugs-list/2002-November/014207.html

This changeset also refactors the close() functionality into
three Gcf methods, fixing a bug (or inconsistency) in which calling
close with a figure number failed to call mpl_disconnect.