[lazarus] GTK2 interface

[Mattias Gaertner]

Hi all,

Thanks to Andrew, the gtk2 interface can now be compiled. And I ran the
first gtk2 lazarus application without error. 
Now it has the same problem as the win32 interface. We need developers to
test and fix the bugs. The current gtk2 interface needs special compilation
and can not be built with 'make'. See lcl/interfaces/gtk2/README for
details. You need the latest gtk2forpascal. cvs is recommended. 


Mattias