Add author to license.
Updated Rakefile to make Thor happy.
Fixed spree i18n namespace.
Engine fixes and cleanup.
Cleanup specs.
Change dependencies for test environment.

- Update so it use Spree 2 resources.
- Add a bit different approach for the test environment with webkit etc.
- Some improvments to gemspec.
Add Swedish locale.
Add some factories that need a bit more attention.
Add some basic spec containers.

Yes, please fill in the gaps :)
Changed travis config.
Updated readme.