Fixes #6555 See #6419 for more discussion. This was done on OSX 10.10 running the latest VirtualBox (5.0.2) & gitian-builder
I've updated the VM creation, and Debian install screenshots.
Updated the Debian ISO link to 8.1.0
Added a work around to allow root to login over SSH (needs review)
Added make & ubuntu-archive-keyring to the list of packages we install
make - so we can use the depends downloader to seed the gitian cache
ubuntu-archive-keyring - squashes warnings such as

This still needs some improvements, but wanted to get it up for feedback.