title: Can't add expansion libraries
body: <p>I'm following <a href="https://developer.android.com/google/play/expansion-files.html#Preparing" rel="nofollow noreferrer">this guide</a> for working with expansion files in Android, but I can't even get the modules set up. When I make a new module and try to import the library as described in item 5 it clears out the path I entered. So I tried to use the terminal commands and there were all kinds of problems with those.</p>
  
  <p>First I tried</p>
  
  <pre><code>android update project --path ~/gitlab/app_location/ --library ~/Library/Android/sdk/extras/google/market_licensing/ \ --library ~/Library/Android/sdk/extras/google/market_apk_expansion/downloader_library/
  </code></pre>
  
  <p>and I got this error</p>
  
  <pre><code>Error: Argument '~/Library/Android/sdk/extras/google/market_apk_expansion/downloader_library/' is not recognized.
  </code></pre>
  
  <p>So I removed the <code>market_apk_expansion/downloader_library/</code> line from the command, intending to take care of it later. The the error came back with</p>
  
  <pre><code>Error: The project either has no target set or the target is invalid.
  </code></pre>
  
  <p>Please provide a --target to the 'android update' command.</p>
  
  <p>So I added <code>--target 21</code> to it and get</p>
  
  <pre><code>Resolved location of library project to: ~/Library/Android/sdk/extras/google/market_licensing
  </code></pre>
  
  <p>Error: ~/Library/Android/sdk/extras/google/market_licensing is not a valid project (AndroidManifest.xml not found).
  Error: No Android Manifest at: ~/Library/Android/sdk/extras/google/market_licensing</p>
  
  <p>I've been working on this for about 3 days now and still have nothing to show for it. Is there something really obvious I'm doing wrong? I've never worked with expansion files before.</p>