upgrade Rubygems 2.4.2
upgrade Chef 11.16.4-1
added Ubuntu Utopic Unicorn 14.10 Server x86_64
added Debian Wheezy 7.7.0 x86_64
bump version naming for Ubuntu Trusty Tahr 14.04.1 Server x86_64
add hosting on Amazon S3 eu-central-1 (Frankfurt)