[Kde-bindings] Common work for Qt4 bindings

[Marcus]

> My idea is to separate 3 stages:
> 1 - query the C++ for classes, functions and enums, and all Qt specific
> info (not sure if GCCXML can handle this part)

Qt's "extensions" to C++ like "signals", "slots", "Q_PROPERTY" end up getting 
#defined away or defined in other C++ things so that they are not 
recognizable to GCC, and GCCXML only sees what GCC would see.

I was looking into whether there is some clever way via macros or something 
that would permit GCCXML to see these extensions. It's see a few months since 
I looked at this.