- clean up the download dialog a bit (removing all traces of KIO)
- simplify entries since they keep track of their state on their own now
- comment out some parts to make debugging easier
- more consistent include guards naming
- default port is now 30303 (10000 is taken by webmin already)

The dialog does still not show anything, which is related to the KDE 4 port.
Data arrives but isn't displayed. Oh well.