[aur-general] virtualbox wiki page

[Emilio Miralles]

Hello,

I took a first stab at restructuring Virtualbox
<https://wiki.archlinux.org/index.php/Virtualbox>. I brought in the content
from Arch_Linux_VirtualBox_Guest<https://wiki.archlinux.org/index.php/Arch_Linux_VirtualBox_Guest>,
and offloaded a bunch of stuff to
VirtualBox_Extras<https://wiki.archlinux.org/index.php/VirtualBox_Extras>.
Discussion of the changes on
Talk:VirtualBox#Page_overhaul_by_dev_request<https://wiki.archlinux.org/index.php/Talk:VirtualBox#Page_overhaul_by_dev_request>
.

Emilio