Use field_get_items() to ouput metadata

One of the gread advantages in this module is that it bases on fields. Thus we should take care use the full power of fields ;)
Currently the function metatags_quick_entity_load() loads the field values with custom code.
I recommend to use field_get_items() instead since this function also takes care of translation.

In my current project the whole multi-language stuff bases on the new field based translation - see: http://drupal.org/project/entity_translation

Attached patch changes the code to use field_get_items() and replaces some trailing spaces.