menu_service patch for d7

Hi

I just assigned for myself as I had already started to look at it. As commented in #626730: xmlrpc_server patch for d7, I'll be detailing the issues I've found on this module for now, until we have conditions to create a patch (awaiting for heyrocker's services core patch).

current issue list for taxonomy_server module:

- menu_service.info file missing core = 7.x and files[] directives.
- menu_tree_all_data() signature has changed, used in menu_service_get() (just to notice, seems it is used the right way but there is no default menu entry now).
- drupal_get_path_alias() signature has changed, used in menu_service_process() (just to notice, seems it is used the right way but default path now is NULL).
- menu item definition has changed, menu_service_process() recursive function should be reviewed to work with current menu entry definition.
- hashes are being used for service definition (see #616490: Services API misuses hash/number (#) symbols)