Make Avalon build on travis-ci (squashed)

Prep for Travis build
Delete .ruby-version
Assign secrets in test environment
Set notifications and ruby versions to test
Give jetty time to spin up before migrating
Attempt to improve bundle install performance in test environment
Update Gemfile.lock
Give felix and jetty 90 seconds to start up
Add build status image
Yes. It's a dummy just for spec testing. As long as no one ever includes it in their own deployment, it'll be fine.