broken links in README.md

[bmillwood]

• the travis-ci link (links to https://travis-ci.com/sras/elminator which is a 404 for me, on line 9 and again on line 170),
• the sample generated code link (links to https://bitbucket.org/sras/elminator-test/src/master/elm-app/src/Autogen.elm which I think has been deleted, on line 101).

[sras]

I think Travis-ci stopped providing their free tier. I ll try to move the CI to somewhere else. Thanks for reporting.