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.
Prevented Qt4 from stopping the interpreter.
Merge branch 'master' of https://github.com/jschueller/matplotlib
Just check DISPLAY env var
Check for a X11 build of Qt
Using a regex to check DISPLAY
Updated docstring for ``RcParams.find_all``.
Merge pull request #1921 from mdboom/fc-match-encoding

Fix filename decoding when calling fc-match
Merge pull request #1861 from pelson/find_all_rcs

Added a find_all method to the RcParams dictionary.
Fix syntax error.
Merge pull request #1905 from jschueller/master

Prevent Qt4 from stopping the interpreter
Fix #1810: Fix vertical text alignment in the Cairo and OS-X backends.
The renderer backends' draw_text method is now passed the location of
the text baseline, not the bottom of the text bounding box.
Use np.deg2rad instead
Updating all mathtext baseline images to hopefully help Travis pass
Increase image comparison tolerance
Increase tolerance on some more tests