Merge pull request #16 from gbang2012/master

Fixes exceptions in MShop_Common_Manager_Abstract (minor)
Adds optional basedir parameter to constructor
Adds APC decorator for extended translation interface
Adds translation infrastructure and german translation for HTML client
Merge pull request #17 from nsendetzky/master

Adds translation infrastructure and german translation for HTML client
Fixes registration of picker UIs
Merge pull request #18 from nsendetzky/master

Fixes registration of picker UIs