CC-2977: Never delete files from the database

- using mtab(previous and current) files to figure out directories to be
added or removed
- adding index to cc_files
- see the tickets and media monitor design page for more info

airtime_mvc/application/controllers/LibraryController.php

@@ -226,7 +226,6 @@ class LibraryController extends Zend_Controller_Action
     public function contentsAction()
     {
         $post = $this->getRequest()->getPost();
-        Logging::log(print_r($post, true));
         $datatables = Application_Model_StoredFile::searchFilesForPlaylistBuilder($post);
         
         //format clip lengh to 1 decimal