Add fix as described in comment ( 52   # see http://stackoverflow.com/questions/9938314/chef-how-to-run-a-template-that-creates-a-init-d-s)
Fix bundle path issue

I was having bundle path resolution issues similar to
github.com/locomote/gusteau/issues/40, but I was not
using gusteau.  I was able to get it working by installing
ruby-bundler and rake from apt repos.
Fix unicorn_rails not found

unicorn_rails was not in the path, so I changed the
command to bundle exec unicorn_rails