Tests are broken

[jasonkarns]

I was in the process of doing a PR for #8 (as I've already added the feature to nodenv-aliases) when I noticed that the tests on master are failing.

git-bisect reports that cd420ba is the commit that broke the tests. I haven't dug in yet whether the test failures are true positives or false positives.

For CI, I've enabled travis on my fork and pushed a trigger build (.travis.yml was already present but it needed a commit to trigger travis.) https://travis-ci.org/jasonkarns/rbenv-aliases

[jasonkarns]

I've opened #14 which fixes the bugs causing the tests to fail. (The test failures were true positives, not false positives.)