Update manual/contrib.texi

[Will Schmidt]

On Thu, 2012-06-14 at 20:50 +0200, Andreas Jaeger wrote:
> I've reviewed the NEWS section for  for 2.16 and propose to add the following entries to
> the manual.
> 
> Ok to commit?


It's certainly OK by me.  :-) 

Thanks, 
-Will


> 
> Andreas
> 
> 2012-06-14  Andreas Jaeger  <aj@suse.de>
> 
> 	* manual/contrib.texi (Contributors): Update entry of Liubov
> 	Dmitrieva and add entries for Will Schmidt and Tulio Magno Quites
> 	Machado Filho.