Added Gentoo-20131024-amd64, Gentoo-20131029-i686 and minimal baseboxes

I added the latest Gentoo boxes for VirtualBox 4.3.0. These box are basically built from [veewee template](https://github.com/jedi4ever/veewee/pull/830) which I updated recently. 

Plain

 * Gentoo 2013.10.24 amd64 (chef, puppet) on 2013.10.30 - 416.4 MB
 * Gentoo 2013.10.29 i686 (chef, puppet) on 2013.10.30 - 413.1 MB
    - packaged with 'unicode noX' setting
    - VirtualBox Guest Additions 4.3
    - portage emptied
    - chef-10.24.0, and puppet-3.3.1

Minimals

 * Gentoo 2013.10.24 amd64 minimal on 2013.10.30 - 279.7 MB
 * Gentoo 2013.10.29 i686 minimal on 2013.10.30 - 266.2 MB
    - packaged with 'unicode noman noinfo nodoc noX' setting
    - no kernel sources
    - portage emptied
    - VirtualBox Guest Additions 4.3