add npm-shrinkwrap.json cachebusting
redirect npm install's stderr to stdout
clear caches before slug compilation
Call nomnom in a subprocess so that it doesn't break the build
Merge pull request #58 from heroku/shrinkwrap

:shipit:
Merge pull request #59 from heroku/clear-node-gyp-cache

clear caches before slug compilation
Merge pull request #64 from playlist-media/diet

Call nomnom in a subprocess so that it doesn't break the build
> dev/null was superfluous
improve compile comments
use the new semver.io/node/resolve/{range} URL syntax
Merge branch 'diet' of https://github.com/heroku/heroku-buildpack-nodejs into diet