Add rake to the test group
Nudge Travis
Don't use "--deployment" flag
Explicitly install only github-pages
Make Gemfile.lock with Bundler
Revert "Nudge Travis"

This reverts commit dd5b4838f3f3b25e26efd17d0611ee88d7a12ffb.
Merge pull request #26 from tfausak/fix-travis-ci

Fix Travis CI build