title: hyper-ledger can not find enrollAdmin.js file
body: <p>I followed "Writing Your First Application" tutorial. when I get to this section "Enrolling the Admin User"<a href="http://hyperledger-fabric.readthedocs.io/en/latest/write_first_app.html#enrolling-the-admin-user" rel="nofollow noreferrer">enter link description here</a>
  it asks me to launch this command <code>node enrollAdmin.js</code>. </p>
  
  <p>But I check out my current directory, this file just doesn't exist. and I try to google it on the internet, search it on my computer, I still can not find it.
  <a href="https://i.stack.imgur.com/6bf1r.png" rel="nofollow noreferrer">enter image description here</a>
  How you guys work out this? Do you have corresponding files?
  Any advice will be appreciated.</p>