Add support for Swedish

* Add support and tests for CompanySE
* Add support and tests for InternetSE
* Add support and tests for PhoneNumberSE
* Add support and tests for AddressSE
* Add support and tests for NameSE
* Add support and tests for SSN and SSNSE
* Update gemspec with new Swedish modules

(mostly used the Danish stuff as templates)
InternetSE, ensure email/username are lowercase
Merge pull request #63 from tilljoel/swedish

Add support for Swedish