Change locale filename for default English.
Add Swedish locale.
More to gitignore.
Updated license to new BSD.
Updated engine to Spree 2 style.
Replated TestUnit with RSpec.

- It still has no real tests but now it follow Spree testing pattern.
- Add SimpleCov and Coveralls.
- Fuubar for test runs.
Add locale spec.
Code cleanup and 1.9 hash syntax.
Fix user decorator to work with Spree 2.x
Add Travis config and updated readme.