Simplified caching strategy: If node_modules directory is checked into source control, rebuild any native deps. Otherwise, restore from the build cache.
Merge pull request #67 from heroku/simpler-caching

Simplified caching strategy
handle semver ranges that contain spaces
consolidate CONTRIBUTING.md into README and clean house.
add a section on legacy compatibility
Merge pull request #71 from heroku/diet

Ship the Diet Buildpack!
add empty bin/release file so as not to break things that expect it to be there
Merge pull request #72 from heroku/add-empty-release-file

add empty bin/release
Set default NODE_ENV to 'production'
add comment about npm executable
be more clear about the effect of `npm prune`
Make the caching messages more clear.
CONTRIBUTING.md doesn't exist anymore. Refer instead to README.md
fix a broken assertion
bin/release should emit a valid yaml mapping.
make bin/release comply with published Buildpack API
Merge pull request #78 from yougov/master

Make bin/release comply with published Buildpack API
Add support for custom .npmrc
Add a test for custom .npmrc support
Merge pull request #79 from gemfury/master

Add support for custom .npmrc