Defaulting package.json "private": true

for an extra measure of paranoia, mostly.
See: https://npmjs.org/doc/json.html#private
Quote all config vars so that spaces don't cause kabooms
Merge pull request #5 from modcloth-cookbooks/default-package-json-true

Defaulting package.json "private": true
Merge pull request #6 from modcloth-cookbooks/tolerate-spaces-in-config-values

Quote all config vars so that spaces don't cause kabooms