Merge pull request #269 from nsendetzky/master

Implements logging of payment and delivery status updates in order manager and improves new type panels for media and text
Merge pull request #270 from nsendetzky/master

Migrates order item emailflag and flag properties to appropriate records in the mshop_order_status table
Incompatible: Removes emailflag and flag related methods from order item which are not required any more
Implements database connections over unix domain sockets
Fixes bug in unix domain socket test of PDO database manager