Fix issue #5 missing mkisofs on linux
Add use case where genisoimage is present instead of mkisofs
Fix issue #5 again. And some other improvements
Merge branch 'master' of github.com:dotzero/vagrant-debian-wheezy-64

Conflicts:
	build.sh
Add install of virtualbox-guest-additions-iso to Linux required packages
Make preseeding more in line to a vanilla Debian Install

This means:
* removal of Russion Localization
* use of official debian packages everywhere
Merge branch 'debian_vanilla' of github.com:EmmanuelKasper/vagrant-debian-wheezy-64 into debian_vanilla

Conflicts:
	build.sh