title: 'create-react-app' is not recognized as an internal or external command
body: <p>I am trying to set up react app using create-react-app command on windows pc. I already used it on my mac computer, and it works well. But I encounter a problem. Here my steps on command line. Am i missing something?</p>
  
  <pre><code>C:\Windows\system32&gt;cd C:\Users\ugur\Desktop\deneme
  
  C:\Users\ugur\Desktop\deneme&gt;npm init
  
  
  This utility will walk you through creating a package.json file.
  It only covers the most common items, and tries to guess sensible defaults.
  
  See 'npm help json' for definitive documentation on these fields
  and exactly what they do.
  
  Use 'npm install &lt;pkg&gt; --save' afterwards to install a package and
  save it as a dependency in the package.json file.
  
  Press ^C at any time to quit.
  name: (deneme)
  version: (1.0.0)
  description:
  entry point: (index.js)
  test command:
  git repository:
  keywords:
  license: (ISC)
  About to write to C:\Users\ugur\Desktop\deneme\package.json:
  
  {
     "name": "deneme",
     "version": "1.0.0",
     "description": "",
     "main": "index.js",
     "scripts": {
      "test": "echo \"Error: no test specified\" &amp;&amp; exit 1"
     },
     "author": "Ugur &lt;ugur@abc.com.tr&gt; (http://www.abc.com.tr)",
     "license": "ISC"
  }
  
  
  Is this ok? (yes)
  
  C:\Users\ugur\Desktop\deneme&gt;npm install -g create-react-app
  C:\Users\ugur\AppData\Roaming\npm\create-react-app -&gt; C:\Users\ugur\
  AppData\Roaming\npm\node_modules\create-react-app\index.js
  C:\Users\ugur\AppData\Roaming\npm
  `-- create-react-app@0.2.0
    +-- chalk@1.1.3
    | +-- ansi-styles@2.2.1
    | +-- escape-string-regexp@1.0.5
    | +-- has-ansi@2.0.0
    | | `-- ansi-regex@2.0.0
    | +-- strip-ansi@3.0.1
    | `-- supports-color@2.0.0
    +-- cross-spawn@4.0.0
    | +-- lru-cache@4.0.1
    | | +-- pseudomap@1.0.2
    | | `-- yallist@2.0.0
    | `-- which@1.2.10
    |   `-- isexe@1.1.2
    +-- minimist@1.2.0
    `-- semver@5.3.0
  
  
  C:\Users\ugur\Desktop\deneme&gt;create-react-app new_app
  
  'create-react-app' is not recognized as an internal or external command, operable program or batch file.
  </code></pre>
  
  <p>Also npm configuration path is like</p>
  
  <p>C:\Users\ugur\AppData\Roaming\npm\node_modules\create-react-app\</p>