Added fluid variable to the Module class

As a developer you still need to code for it (it's shown at work in the bootstrap) but you can use the variable to toggle fluid and fixed right from the module itself

classes/Module.php

@@ -43,6 +43,14 @@ class Module extends Object
 	 */
 	protected $db = null;
 
+	/**
+	 * Fluid or Fixed?
+	 *
+	 * @access protected
+	 * @var    boolean
+	 */
+	protected $fluid = false;
+
 	/**
 	 * Page Title
 	 *