Merge branch 'master' of github.com:rug-ba/ruby_developer_vm

* 'master' of github.com:rug-ba/ruby_developer_vm:
  add notice regarding 'berks'
  added notice regarding berkshelf
  add Vagrantfile with chef recipes to set up a ruby dev environment
  add packer template for Ubuntu 13.10 Server 64-Bit
  removed virtual box image
  add vm