Updating all Memcached_DataObject extended classes to Managed_DataObject

In some brief tests, this causes no problems.

In this state however, you would need to modify DB_DataObject to have a static declaration of staticget (and probably pkeyGet). The next commit will change the staticGet overload to a unique function name (like getKV for getKeyValue), which means we can properly call the function by PHP Strict Standards.

classes/Status_network.php

@@ -42,7 +42,7 @@ class Status_network extends Safe_DataObject
     public $modified;                        // timestamp()   not_null default_CURRENT_TIMESTAMP
 
     /* Static get */
-    function staticGet($k,$v=NULL) {
+    static function staticGet($k,$v=NULL) {
         $i = DB_DataObject::staticGet('Status_network',$k,$v);
 
         // Don't use local process cache; if we're fetching multiple