* qt/examples: Add QtDBus example programs:
- hello: Hello, World
- ping: Simple method-calling program
- pong: Simple object-exporting program (not using adaptors)
- complexping: Interactive method-calling program
(also gets and sets properties).
- complexpong: Sample program exporting methods, signals and
properties, using adaptors.
- dbus: Simple implementation of a generic method-calling
program, similar to 'dbus-send', but with semantics
similar to 'dcop'.
- chat: Simplistic chat program, implemented using signals
and the system bus. Looks like IRC.
