depreciate Debian Wheezy 7.2.0 x86_64
depreciate Debian Wheezy 7.1.0 x86_64
depreciate Debian Wheezy 7.0.0 x86_64
upgrade Debian Squeeze 6.0.7 x86_64 to Debian Squeeze 6.0.9 x86_64
upgrade to Chef 11.10.4-1 and VirtualBox Guest Additions 4.3.8 on Debian Squeeze 6.0.9 x86_64
extend cleanup on Debian Squeeze 6.0.9 x86_64
remove lxc-docker-0.9.0 on Ubuntu Raring Ringtail 13.04 Server x86_64
remove lxc-docker-0.9.0 on Ubuntu Precise Pangolin 12.04.4 LTS Server x86_64
move prebuild boxes from Amazon S3 to [GoogleDrive](https://goo.gl/SOQ5nU)
introduce [SHA512SUMS](https://docs.google.com/uc?export=download&id=0B83ZToJ3fGtDeEx6U1VVcFF0Yk0) for all prebuild boxes