_Actually_ update my GitHub username
Display test description on failure
Don't leak variables outside of pair()
More readable tests
.pairrc can be sourced any time
Test missing authors
Test exit codes
Favor $() over backticks
Whitespace, style cleanup
Simpler print statement
More UNIX-y tests

* Failure messages to to STDERR
* Nonzero exit on failures
Add Travis config. Closes #9.
Idempotent install script & tests. Closes #8.
Add test runner
Simplify test

* Don't backup files if they don't exist
Remove temp files after tests
Add setup/ directory, make test/ structure consistent
Update relative paths with new directory structure
Update README with new directory structure