removed the branches endpoint

we already have branch info accessible via the repos endpoints, having this at the root level doesn't make sense.
Merge pull request #94 from travis-ci/jk_remove_branches_endpoint

Remove the branches endpoint
regenerate gemspec
add endpoint for linting
Merge pull request #123 from travis-ci/rkh-lint

add endpoint for .travis.yml linting
Merge branch 'master' into ha-feature-remove_log_endpoint

Conflicts:
	Gemfile.lock
	travis-api.gemspec