travis CI deployment by tags

@twobraids r?

I generated the extra to `.travis.yml` using their command line tool. 
And the notes I wrote and added to the README are basically "from memory" meaning I haven't tested it. I've never been particularly good at tags so the only good way to test this is to (once this is merged) make a new release that is identical to 1.2.8 except an incremented version.