Updated the macosx backed figure manager show function to bring the
figure to the front upon execution.
fix typo in figlegend_demo.py

otherwise y4 never gets used
BUG: 3 fixes for widgets (MultiCrusor, SpanSelector, Slider)
Fix #3298.  Wedge's shouldn't special case the "round the horn"
Update demo_floating_axes.py
Update demo_floating_axes.py
include PySide in qt4agg backend check
Fix path clipping
PEP8
Added center and frame arguments for pie-charts
Fix scaling of custom markers

See also #3441.
Added test for frame and center arguments on ax.pie()
Fixed pep8 conformance
Count the uses of paths in a collection

Add a way for backends to query how many times each
path in a collection can be reused.
Use the uses_per_path data in pdf backend

Fixes matplotlib/matplotlib#3345
Add the new test in the list of tests
Add new baseline images for two tests

These look closer to their png counterparts than the old ones.
There probably is a remaining bug in the drawing of edges.
Handle path collections without stroke in PDF backend
Merge pull request #3 from mdboom/pdf-xobject-linewidth

Pdf xobject linewidth
BUG : fix str vs bytes issue in py3 in ps backend

de-code the encoded ascii string so that it is a string, not
bytes, when it gets passed to the format function.  Having the
b'' from the bytes string appear in the eps file breaks the file.

closes #3494