Merge pull request #165 from dahoffmann/master

Remove unnecessary method _getSiteIds() from MShop_Common_Manager_Abstract
Removes product link in HTML again (URL view helper not available at this time)
Streamlines handling of NULL values for countryid and langid in addresses
Fixes attribute code set by PropertyAdd plugin
Merge pull request #166 from nsendetzky/master

Fixes langid/countryid definition, fixes attribute code, removes product links in e-mail template again
Adds missing abstract keyword to class MShop_Common_Factory_Abstract