Update license and readme.
Refactor engine.

- More stuff to gitignore.
- Fuubar for specs.
- Updated rakefile and engine.
- Improved gemspec.
- Bumped to version 1.4
Updated spec base and add locale spec.

Add standard dependencies which can be cleaned up later if never used.
Engine has for the moment no real test coverage.
General code formatting and Spree i18n namespace.
Updated locales.

Updated locales with Spree namespace and missing translation keys.
Changed french translation to match Rails i18n.
Add Swedish translation.