tweaked zorder to match line2D's default zorder
Add a comment explaning __import__ syntax.
Merge pull request #2319 from tacaswell/draw_idle_fix

fix draw_idle reference in  NavigationToolbar2
added entry to api_changes for type of `colorbar.ColorbarBase.outline`
Merge pull request #2301 from mdboom/travis-artifacts

Upload test result images to Amazon S3
Add paragraph about PDF code of conduct.
Merge pull request #2054 from mdboom/ipython-webagg-integration

Ipython/Webagg integration
Merge pull request #2352 from tacaswell/colorbar_outline_fix

changed colorbar outline from a Line2D object to a Polygon object
Make pylab inline figures work again
Merge pull request #2358 from mdboom/fix-inline-figures

Broken IPython notebook integration
Enable Amazon S3 and fix URL
Merge remote-tracking branch 'upstream/v1.3.x'

Conflicts:
	.travis.yml
	lib/matplotlib/backends/qt4_editor/formlayout.py
Add S3 info
Better axis limits when using shared axes and empty subplots
Attempt to fix some failing tests
Fix the PDF core fonts test
Merge pull request #2357 from ChrisBeaumont/empty-shared

Better axis limits when using shared axes and empty subplots
[bug correction] triinterpolate is independant of triangulation numbering.
Merge pull request #2363 from GBillotey/new_test_triinterpolate

[bug correction] trirefine is now independant of triangulation numbering
[bug correction] triinterpolate is independant of triangulation numbering.