CC-2255: Separate user types admin and program manager

- New user type 'Program Manager' added
- 'Program Manager' gets same previlage as Admin but doesn't
have access to Configure menu
- Changed user type name 'Host' to 'DJ'

airtime_mvc/application/views/scripts/schedule/index.phtml

@@ -1,4 +1,4 @@
-<?php if($this->isAdmin) : ?>
+<?php if($this->isAdmin || $this->isProgramManager) : ?>
     <form id="add-show-form" method="post" action="" style="display:none;">
     <?php echo $this->render('schedule/add-show-form.phtml') ?>
     </form>