NPM Best Practice for WebStorm?

Running WebStorm 5 on OSX for Node development.  I run npm command line, but noticed when I create a project in WS it uses npm init and creates a package.json etc.  Is npm integrated? Is there documentation for how to use npm in the IDE? (Can it be set up as a command tool or is there something similar as ruby gems installs in RubyMine?). How do others use npm with WebStorm?

Thanks,

Mark