[cairo] [ANN]: CairoAda link added

[Anne et Damien Carbonne]

Hi,

I have published the last CairoAda binding for cairo-1.8.x.
It is there: http://sourceforge.net/projects/cairoada
I added a link on the cairo binding page 
(http://cairographics.org/bindings), but it is not yet visible.
I suppose it must be approved by someone before being accepted.

I met the same type of difficulties than others to create the binding 
for user fonts.
At the moment I did someting very similar to the C version with 
callbacks that can be attached or not.
I thought of creating an abstract base class, with virtual and pure 
virtual funtions (C++ naming!),
but did not find any satisfying solution.
The problem was to provide a default implementation for callbacks that 
can be NULL.

Thanks for  this great library.

Regards,

Damien