https://github.com/matplotlib/matplotlib/pull/1710
When a font doesn't have a glyph name, we should synthesize.  This fixes the
Arial font problems under Windows 8.
DOC improves documentation on the pyplot module and the bar method
backend_pgf: clip paths within the backend (fixes #1857)
Fix gen_rst.py to use the correct encoding even on Python 2.
Added a find_all method to the RcParams dictionary.
Updated RcParams.find_all to use re. Added a str and repr for RcParams & added some tests.
Switching b and c in _transformation_converter to fix issue #1886
Prevented Qt4 from stopping the interpreter.
Merge branch 'master' of https://github.com/jschueller/matplotlib
added rcParam for x and y margin

Addresses issue #1766
Just check DISPLAY env var
updated docs + changelog
Fixed handling of ArrowStyle class input to set_arrowstyle function. Fixes #1812
Fix texmanager.dvipng_hack_alpha() to correctly use Popen.

Previously would never find dvipng, so always returned False.
Normalize all 'e.g.' instances. Addresses issue #1423.
Merge pull request #1914 from mgiuca-google/dvipng_hack_alpha_fix

Fix texmanager.dvipng_hack_alpha() to correctly use Popen.
Corrected a wrong numpy record name in documentation. adjusted_close in parse_yahoo_historical doesn't exist, the author mean aclose
Merge pull request #1915 from lodatol/master

Corrected a wrong numpy record name in documentation.
Merge pull request #1897 from mdboom/doc/encoding_gen_rst

Fix documentation build failure (unicode error in generate_example_rst)
Corrected a wrong numpy record name in documentation. adjusted_close in parse_yahoo_historical doesn't exist, the author mean aclose