Changed Vagrantfile to work with the upgraded Vagrant and Berkshelf
cookbook build-essential added as dependency
secret_token attribute added since the errbit version requires this to be set to start properly
Merge branch 'vagrant-upgrade'

* vagrant-upgrade:
  secret_token attribute added since the errbit version requires this to be set to start properly
  cookbook build-essential added as dependency
  Changed Vagrantfile to work with the upgraded Vagrant and Berkshelf