title: Add Google ExoPlayer to Android studio gradle build
body: <p>If i have an Android app developed using Android Studio is it possible to link the ExoPlayer library (<a href="https://github.com/google/ExoPlayer">https://github.com/google/ExoPlayer</a>) straight from github using graddle?</p>
  
  <p>It would be handy not to manually have to download the library and copy it into my project every time it's updated by the ExoPlayer team.</p>
  
  <p>I have tried adding this to the <code>build.gradle</code> in my module.</p>
  
  <pre><code>repositories {
      mavenCentral()
      maven { url 'https://raw.github.com/google/ExoPlayer' }
  }
  dependencies {
      compile 'com.google.android.exoplayer'
  }
  </code></pre>
  
  <p>But i get an error about the module notation being invalid...</p>