title: Laravel 4.1 - Sentry 2 User group access/permission
body: <p>I'am building my project using Laravel 4.1 with Sentry 2 as authorization and authentication package.<br />
  I've managed to log users in, register them and assign proper user groups.<br />
  I have 3 user groups:</p>
  
  <ul>
  <li>Administrator</li>
  <li>Presenter</li>
  <li>Registered</li>
  </ul>
  
  <p>I want to achieve 2 things:</p>
  
  <ol>
  <li><strong>Administrators</strong> and <strong>Presenters</strong> can have access to the Administration Panel. <strong>Users</strong> don't.<br /></li>
  <li>Restrict views in Administration Panel for Presenters. I want them to see only few views (links), for example only <strong>Schedule</strong>.</li>
  </ol>
  
  <p>I've never used roles before and this is first time i use Sentry 2. That's why i'd like to ask for some help. Some point, how to start. How can i achieve both?</p>