Fix RST tests

The new version of bleach now sorts attributes alphabetically so that
the results are deterministic (see
https://github.com/jsocol/bleach/pull/137)

so I had to reverse the order of attributes in the expected HTML.
.travis.yml: Small tweaks mainly to kick Travis
Merge pull request #11 from msabramo/kick_travis

.travis.yml: Small tweaks mainly to kick Travis
Merge pull request #12 from msabramo/fix_rst_tests_bleach_attribute_ordering

Fix RST tests
Allow the `class` attr for all tags

because we want to use this module in PyPI and PyPI's current generated
HTML has these `class` attributes.