picture comparison depands on the matplotlib version

[wjlei1990]

Hi Lion,

I replace the comparison picture using matplotlib 1.4.3 and then the tests about picture comparison passed without any issue. However, when I installed pyflex on my local computer, it failes with matplotlib 1.5.1.

Here is the diff result:

Which I think just some texts position difference.

[krischer]

Yea that happens. There are three possible solutions:

• Up to tolerance for matplotlib 1.5.1
• Create two sets of test images
• Create the baseline images for matplotlib 1.5.1 and up the tolerances for all lower matplotlib version

I vote for the last one. I can take care of it if you want to.

[wjlei1990]

OK. I will leave it to you...

Do you think we can merge our two branches recently? :)