Compilation of bamf fixed and gnome-control-center download URL fixed

First of all thanks for the great job porting Unity to Arch!

I've installed it today and found just minor issues, that I've fixed on my fork and tested on my notebook.

There's a bug on bamf 0.4.0, already fixed for the upcoming 0.5.0. I've generated an patch with the fix to be applied (more the details on the commit message).

Also, the gnome-controle-center file was renamed on the gnome3 ppa from raring1 to raring2.

I hope I haven't broken anything.