Adds check of the length of code in the items and in the admin interface.
Changed exception message.
Using a central abstract method for code checks.
Enforces character case for language and country ID
Fixes configuration directives for delivery address
Adapts tests to language/country ID character case enforcement
Merge pull request #151 from doleiynyk/2012-04-24_code_not_longer_than_32_chars

Adds check for the length of the code in the items and in the admin interface
Merge pull request #159 from nsendetzky/master

Fixes configuration directives for delivery address, enforces character case for language and country ID
Fixes property visibility
Changes property visibility to private in all test classes
Uses private property visibility
Merge pull request #160 from nsendetzky/master

Changes property visibility to private
Improves config implementations and adds performance tests
Merge pull request #161 from nsendetzky/master

Improves config implementations and adds performance tests
Adds position to plugin items
Merge pull request #162 from nsendetzky/master

Adds position to plugin items
Implements getAttributeItem() method in order product/service items
Adapts tests to changed event notification
Links ordered products to product detail page
Improves tests to work with and without translations