Removed second declaration of cJobManager. There is already one in cJobManager.hpp/.cpp

Signed-off-by: Jan Nemecek <Nemecek.Jan@seznam.cz>
- Moved cInterfaceWindowXML class to its own InterfaceWindowXML.cpp/.hpp files
- Updated project files accordingly

Signed-off-by: Jan Nemecek <Nemecek.Jan@seznam.cz>