Use `--portcount` (>=4.3) or `--sataportcount` (<4.3) depending on VBox version.

Fixes dotzero/vagrant-debian-wheezy-64#15.

Conflicts:
	build.sh
Polish setup
Changed mirror protocol to http

It looks like vagrant is having a hard time to fetch from ftp.
Connections are dropped randomly.
Allowing non-free packages.

Needed it to instal libapache2-mod-fastcgi.