Remove extra backtics

There is a mix of backticks and $() in the unless which lead to a bug with an extra ) at the end. Resolves issue #1.
Retab closing brace
Merge pull request #2 from metcalfc/patch-1

Remove extra backtics
Merge pull request #3 from haus/patch-1

Retab closing brace
Update for 0.0.3 release