title: Import module from node_modules (create-react-app)
body: <p>How do I import modules from outside src directory?</p>
  
  <pre><code>./src/App.js
  Module not found: Can't resolve 'material-ui' in '/Users/suvo/GitHub/portfolio/src'
  </code></pre>
  
  <p>According to <code>react-material-icons</code> page, I was supposed to import as follows:</p>
  
  <pre><code>import mui from 'material-ui';
  </code></pre>
  
  <p>the error's strange. i got <code>import $ from 'jquery';</code> just next to <code>import mui...</code> and it works fine. What's more, if i create a new project and add 
  react-material-icons, the npm won't start, showing an error: </p>
  
  <pre><code>&gt; myapp@0.1.0 start /Users/suvo/GitHub/myapp
  &gt; react-scripts start
  
  sh: react-scripts: command not found
  npm ERR! file sh
  npm ERR! code ELIFECYCLE
  npm ERR! errno ENOENT
  npm ERR! syscall spawn
  npm ERR! myapp@0.1.0 start: `react-scripts start`
  npm ERR! spawn ENOENT
  npm ERR! 
  npm ERR! Failed at the myapp@0.1.0 start script.
  npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /Users/suvo/.npm/_logs/2017-09-11T11_40_15_791Z-debug.log
  </code></pre>