Include test files in subdirs of test/ too
Use Minitest, which is awesome
`rake test` by default
sup-config should expand ~ in path
Make axe() a little bit DRY.

This was part of a quick stab on leveraging HighLine's auto-completion
capability, which is not quite usable for now.
Merge pull request #50 from 5long/expand-tilde-in-source-url

Expand tilde in source url