Made Retriever static and added a thread counter
Removed tracked files in /bin
Added new abstract class XmlAsyncTask
Moved common methods from ArticlesAsyncTask to XmlAsyncTask (abstract)
Parameterized XmlAsyncTask
Added Enum Utskott for filtering
Fixed some more with Utskotts-filtering
Refactored main package from com.example. -> org.group13.
Merge
Refactoring complete