travis has svg badges now (and they intend to transition png to svg)

Now we can enjoy retina 100%
Merge pull request #851 from reaperhulk/fancier-travis-badge

travis has svg badges now (and they intend to transition png to svg)
Fixed #809 -- switch back to always using UnsupportedAlgorithm
Address most of my own comments
Add additional reason tags
Update tests and raise sites
Update tests
Fix typo in CC
pep8