matplotlib Code

Merged revisions 7483,7485,7487-7488,7491-7497,7503-7505,7507-7508,7510-7513,7515-7516,7518,7520,7524-7527,7531-7532,7534-7535,7537-7540,7542-7551,7568,7570,7578-7581,7585-7587,7590-7597,7599,7601-7606,7608-7615,7619-7625,7627-7632,7634-7637,7641-7702,7704-7706,7710-7716,7718-7723 via svnmerge from
https://matplotlib.svn.sf.net/svnroot/matplotlib/trunk/matplotlib

Backport recent changes in trunk to the mathtex branch.

Update the mathtex branch so that it is up-to-date with trunk.

Creating a branch for mathtex integration.