[ci skip] DocBlocks for Pagination, Session, Trackback, Jquery libraries

Partially fixes issue #1295
diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php
index fb5b9fd..bb13c33 100755
--- a/system/libraries/Session/Session.php
+++ b/system/libraries/Session/Session.php
@@ -52,10 +52,29 @@
  */
 class CI_Session extends CI_Driver_Library {
 
+	/**
+	 * Initialization parameters
+	 *
+	 * @var	array
+	 */
 	public $params = array();
+
+	/**
+	 * Current driver in use
+	 *
+	 * @var	string
+	 */
 	protected $current = NULL;
+
+	/**
+	 * User data
+	 *
+	 * @var	array
+	 */
 	protected $userdata = array();
 
+	// ------------------------------------------------------------------------
+
 	const FLASHDATA_KEY = 'flash';
 	const FLASHDATA_NEW = ':new:';
 	const FLASHDATA_OLD = ':old:';
@@ -63,6 +82,8 @@
 	const EXPIRATION_KEY = '__expirations';
 	const TEMP_EXP_DEF = 300;
 
+	// ------------------------------------------------------------------------
+
 	/**
 	 * CI_Session constructor
 	 *
@@ -596,8 +617,16 @@
  */
 abstract class CI_Session_driver extends CI_Driver {
 
+	/**
+	 * CI Singleton
+	 *
+	 * @see	get_instance()
+	 * @var	object
+	 */
 	protected $CI;
 
+	// ------------------------------------------------------------------------
+
 	/**
 	 * Constructor
 	 *