Adds button copy.
Adds copy to context menu.
Removes copy from locale site menu.
Makes implementation easier.
Merge pull request #167 from dahoffmann/master

Adds missing abstract keyword to class MShop_Common_Factory_Abstract
Removing one else if.
Removes redundant code.
Minor changes.
Some improvements.
Removes comments for hidden attributes
Removes slashes in URL parameters as this confuses the router
Centralizes tax calculation and adds tests
Fixes test for URL view helper
Executes only tests or performance tests, not both
Merge pull request #168 from nsendetzky/master

Fixes URL parameters, removes hidden attribute comments and centralizes tax calculation
Adding deleteItems function.
Adding header.
Improves button fonds and combines button CSS
Adapts test
Removes old button background