title: How to suppress output when running npm scripts
body: <p>I have decided to experiment with npm scripts as a build tool and so far I like it.  One issue I'd like to solve is when running a script to run jshint when something doesn't pass linting I get a ton of "npm ERR!" lines.  I would like to suppress these as the output from the linter is more meaningful.</p>
  
  <p>Is there a good way to set this globally and is there a way to set it for each script run?</p>