DBus XML parser

Hi everybody!

Attached you will find a initial version of a DBus XML parser for doxygen.

D-Bus interfaces are part of the public interface of a program. So D-Bus 
interfaces need to get documented. Having doxygen support this is nice as its 
syntax is well known, developers probably know it already and there is a good 
chance of the buildsystem already supporting doxygen

So far this code only allows for documentation of interfaces, methods and 
signals. It would make sense to add a (non-standard) extension to the D-Bus 
XML which allows to add documentation to types used.

I would be happy if somebody could take the time to review the patch and even 
more happy if somebody could apply it

Best Regards,
Tobias

------------------------------------------------------------------------------
Register Now & Save for Velocity, the Web Performance & Operations 
Conference from O'Reilly Media. Velocity features a full day of 
expert-led, hands-on workshops and two days of sessions from industry 
leaders in dedicated Performance & Operations tracks. Use code vel09scf 
and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf

_______________________________________________