Add Travis CI to give quicker feedback on pull requests.
Merge branch 'travis' of https://github.com/gsnedders/gumbo-parser into travis_ci

This is pulling the .travis.yml file that Geoffrey started on a while ago in as
a starting point for Travis CI integration.  I'll probably tweak a bit to remove
some of the messier bits and ensure it runs all the tests successfully before
merging into master.
Update travis.yml.  Tested on a clean EC2 install, this sequence of commands should work and test most of the install sequence.
Merge branch 'master' into travis_ci

This pulls in the build fix for clock_gettime => clock, which should hopefully
make Travis pass.
Add Travis CI build status icon to the README.
Merge pull request #263 from nostrademons/travis_ci

Enable Travis CI