D7 port of menu_import

EDIT: download link removed

- can be used in install profiles (without the need of an external file)
- it is possible to link to internal pages, like contact
example:

  // Create new menu.
  $menu = array(
    'title' => 'My new menu',
    'menu_name' => 'my-new-menu',
    'description' => '...',
  );
  menu_save($menu);

  // Import menu structure.
  $options = array(
    'search_alias' => FALSE,
    'search_title' => FALSE,
    'node_attach' => MI_NODE_LINK_CREATE,
    'node_type' => 'page',
    'node_status' => 1,
    'node_language' => 'en',
  );
  $menu_structure = 'Home|<front>
About
- History
- Team
Gallery
Contact|contact';
  menu_import_string($menu_structure, 'my-new-menu', $options);

I am out of ideas for improvement, and do not know abot any bugs..