#1 Add ISO country codes

[Fernando Scanavino]

Add ISO 3166 codes
Use numeric code as primary key
Country names should be language dependent
http://en.wikipedia.org/wiki/ISO_3166

Flags? http://www.famfamfam.com/lab/icons/flags/

[Fernando Scanavino]

Started.

Added IsoCountry, IsoCountryCodeValidator, IsoCountryCodeHelper, IsoCountryCodeRepository, IsoCountryNameRepository and IsoCountryRepository. Included unit tests and unit test suites.

Currently implementing IsoCountryCodeRepository with properties files support.

Next step: Implement Name and Country Repositories.