[BEP-868] ISO2 and ISO3 country codes
[BEP-868] Fixed exceptions
[BEP-868] Added EU
Merge pull request #3 from ShopwareAG/BEP-886

[BEP-868] ISO2 and ISO3 country codes
Implemented: Validated Product#images property.
Updated: Product#images must be an array. Stricted check.
Merge pull request #4 from ShopwareAG/validate-product-images-format

Implemented: Validated Product#images property.
Fixed: Mark tests that rely on PDO skipped, if PDO is not loaded.
Fixed: Removed orphan variable.
Fixed: Removed manuel PHPUnit require, already loaded by composer.
Add tutorials
Fix some tutorial issues.
Fix docu with regard to SDK#handle()
Add dev tool to test product export.
Full flie of SQL dump.
Fix bug in SDK.
Merge branch 'master' into ArticleShipping
Removed parsing and serializing code from structs
Implemented shipping rule parser
Convert delivery time