Compare result lists using the appropriate assertions

Instead of sorting the arrays and then performing a deep equality
comparison (and redundantly checking if the array is empty), check
if the result and control arrays have the same members.
Add real async functionality

Instead of faking asynchronicity using `process.nextTick`, we now
perform the globbings truly asynchronously and simultaneously.
Add README
Release v0.2.0
Add repository and issue tracker URLs to package.json