title: SharedStorageAccessManager is not accessible
body: <p>I want to use <code>SharedStorageAccessManager</code> in my Windows Phone 8.1 application to copy file passed to it by FileTypeAssociation. Such example is shown here: <a href="https://msdn.microsoft.com/library/windows/apps/windows.phone.storage.sharedaccess.sharedstorageaccessmanager.copysharedfileasync(v=vs.105).aspx" rel="nofollow">https://msdn.microsoft.com/library/windows/apps/windows.phone.storage.sharedaccess.sharedstorageaccessmanager.copysharedfileasync(v=vs.105).aspx</a></p>
  
  <p>The problem is I cannot find the way to reference it to my project. I've searched for <code>Windows.Phone.Storage.SharedAccess</code> but without success.</p>
  
  <p>Is there anyone who know how can I add such lib?</p>