add thherubyracer to resolve ExecJS error
ignore Chef cookbooks
gemfile.lock for rubyracer
remove apt-gets, use Chef instead
Cheffile for Librarian-chef
change to 64bit Ubuntu Trusty
port forward for ruby server
more memory for VM, 512mb not enough for bundle..
chef-solo provision
start Ruby on Rails server after Chef
default credentials to database.example.yml for quick start