reconfigured Vagrant with using berkshelf

bundle exec vagrant plugin install vagrant-omnibus
bundle exec berks init config/provisioning
Berksfile: added and installed recipes

bundle exec berks install
Vagrantfile: refactored to use configuration from node vagrant.json
Vagrantfile: forward port 3000 to guest system
Gemfile: added therubyracer gem
database switched to sqlite
added db schema

rake db:create && rake db:migrate
Gemfile: added unicorn and capistrano