title: Which Angular Material version should I install to be compatible with Angular4?
body: <p>Which Angular Material version should I install to be compatible with Angular4?</p>
  <p>I have used below command to install angular Material on the top of Angular 4 project.</p>
  <pre><code>npm install @angular/materail 
  npm install @angular/cdk
  npm install @angular/animations
  </code></pre>
  <p>While I try to run the app I am getting below error.</p>
  <pre><code>/node_modules/@angular/cdk/observers/typings/observe-content.d.ts (33,22): Type 'ElementRef' is not generic.
  </code></pre>