tweaked cache and session namespacing.

system/session/memcached.php

@@ -0,0 +1,52 @@
+<?php namespace System\Session;
+
+use System\Cache;
+use System\Config;
+
+class Memcached implements Driver {
+
+	/**
+	 * Load a session by ID.
+	 *
+	 * @param  string  $id
+	 * @return array
+	 */
+	public function load($id)
+	{
+		return Cache::driver('memcached')->get($id);
+	}
+
+	/**
+	 * Save a session.
+	 *
+	 * @param  array  $session
+	 * @return void
+	 */
+	public function save($session)
+	{
+		Cache::driver('memcached')->put($session['id'], $session, Config::get('session.lifetime'));
+	}
+
+	/**
+	 * Delete a session by ID.
+	 *
+	 * @param  string  $id
+	 * @return void
+	 */
+	public function delete($id)
+	{
+		Cache::driver('memcached')->forget($id);
+	}
+
+	/**
+	 * Delete all expired sessions.
+	 *
+	 * @param  int   $expiration
+	 * @return void
+	 */
+	public function sweep($expiration)
+	{
+		// Memcached sessions will expire automatically.
+	}
+
+}