Adding Go to the list of versioned runtimes supported by deploy addon

as it appears it will "Just Work" and I was operating under the
assumption that it *did* already work.
Escape ANSI codes in travis_wait()
Add timeout option support to travis_wait

If the first argument given to travis_wait looks like an integer,
treat it as a new timeout (instead of the default 20 minutes).
Also, tweak timeout message.
Remove unnecessary travis_wait_impl function
Highlight exit status report strings
Merge pull request #220 from travis-ci/ha-feature-highlight-nonzeo-exit-status

Highlight exit status report strings
Merge pull request #203 from modcloth-labs/support-go-versioned-runtime-in-deploy-addon

Adding Go to the list of versioned runtimes supported by deploy addon
define if on MockShell