travis: upload images to imgur after test failure (thanks to @krischer :))
image comparison test setup tweaking
try to fix travis.yml
travis: keep images after testrun
fix image comparison test setup
try/except setting text.hinting_factor in image comparison setup
travis: try to fix image upload
use matplotlib 1.3 in travis
update baseline images to mapltotlib 1.3.0
update some more test baseline images
update some more test baseline images
update some more test baseline images
image comparison class: close image after testing (avoids warning about
many open figures from matplotlib)
image testing: set higher tolerance (matplotlib uses even higher value
of 13)