title: Typescript -w(watch) is not working in my installation
body: <p>I have installed the Typescript 2.0.6, i am also having the node installation. If i try to compile a file in watch mode with "-w" it is not working. It throws the below error.</p>
  
  <pre><code>ts5001: the current host does not support the '--watch' option
  </code></pre>
  
  <p>Used the below command to compile my typescript file "index.ts"</p>
  
  <pre><code>tsc -w index.ts
  </code></pre>
  
  <p>If any know please help me how to compile the code in watch mode.</p>