fix draw_idle reference in  NavigationToolbar2

Upload test result images to Amazon S3

…tion

Ipython/Webagg integration

changed colorbar outline from a Line2D object to a Polygon object

Broken IPython notebook integration

Conflicts:
	.travis.yml
	lib/matplotlib/backends/qt4_editor/formlayout.py

Better axis limits when using shared axes and empty subplots

…late

[bug correction] trirefine is now independant of triangulation numbering

make sure we only perform absolute imports on loading a backend

Stop relying on 2to3 and use `six.py` for compatibility instead

removed some of the unneeded imports

End result of the experiment: The failure isn't related to the tests
added by this PR.

Add easy style sheet selection

…emonstrate.

"python tests.py" runs all tests from mpl and the toolkits.
mpl_toolkits.test() runs tests of the toolkits only.