first rudimentary steps of the adminPanel DB-Connection 

-- pagedescription works, the others not right now 

TODO: 
-- refactoring of the AdminPanelSettingController -> extract the methods
-- read/modify/add/delete user data 
-- read/write DB values for the other pages 
-- add DB queries on the mainpage, Imprint, TermsOfUse,
Pagedescription,.. 
-- session necessary 

Change-Id: I27f1e35ccce0cebb41867f18b91d09f1fdb157f0
Restores page headers.