Fix path clipping
PEP8
Merge pull request #3485 from jkseppan/reduce-xobjects

ENH : Reduce the use of XObjects in pdf backend
Merge remote-tracking branch 'pipping/master'

Conflicts:
	examples/api/scatter_piecharts.py

White space induced conflicts

Conflicts:
	examples/api/scatter_piecharts.py
Merge pull request #3298 form mbdoom/arc-bug

BUG : Wedge not honouring specified angular range

Fixed minor PEP8 as part of merge
Merge pull request #1751 from mdboom/path-clipping

BUG : Polygon is corrupted with SVG backend in a certain condition
BUG : update pyplot
Merge pull request #3695 from tacaswell/v1.4.2_proposal

BUG : update pyplot
Backport of 48573d7 to 1.4.x branch
DOC : updated github stats
DOC : added google tarcking code
BLD : add more paths for darwin

 from mdboom, committed by tacaswell
REL : v1.4.2
REL : version bump back to 1.4.x
Merge branch 'v1.4.2' into v1.4.x

Conflicts:
	lib/matplotlib/__init__.py

White-space conflicts
DOC : updated DOIs in citing.html
Merge pull request #3720 from tacaswell/citing_update

DOC : updated DOIs in citing.html
Merge pull request #3699 from mdboom/no-marker-edge-width-fix

BUG : Backport of #3687 to 1.4.x
Merge pull request #3729 from alimuldal/fix_eventplot_colors_arg

BUG : handling of color=None by eventplot(), fixes #3728
Use map_async and get to avoid a deadlock