Only start the refresh timer after having processed the results.

On slow systems with long process lists we might call updateProcesses()
faster than it needs to finish otherwise.
wk2application requires Qt5Quick
Merge commit '7aa78c0b43fd365fe56f4be28be9c3000ba6a2da'
Enable usage of Q_DECL_OVERRIDE with Qt4.
Factor out server greeting code into its own method.
Make serverAddress() return an URL.

This is done in order to support different transport mechanisms.
Add abstraction for transport mechanisms on the server side.

So far only covering TCP/UDP, as before.
Mark things as deprecated that are still TCP-specific.