matplotlib Code

testing: collect new image results on failed image comparisons

testing: convert function names to MPL coding standard

testing: initial spine test (test for SF#2852168)

testing: add new, simplified testing infrastructure

testing: move image comparison functions into matplotlib.testing

testing: switch known failure condition to 'indeterminate' for SF bug 2850075

Testing: mark test with knownfailure decorator

This will let the buildbots detect any new errors while we figure out
what's going on with this one.

buildbot: allow passing arguments to select virtualenv and nose

This is useful for getting the buildbot to run Python2.4.

buildbot: removed forced error

buildbot: force error to test reporting abilities