Xfce4-Dict GTK3 Port

[André Miranda]

Hello Folks,
I've been working on Xfce4-Dict for a while and the GTK3 port is almost 
done, the only pending task is to use GDBus instead of GDK Events.
Here is my WIP repository, probably won't compile, some uncommitted code 
here is comment in order to compile.
Reviews are more than welcome.

Simon, please give me permission to update the roadmap (user: andreldm) 
or update xfce4-dict's progress to 90%.

Cheers,
André Miranda