Merge branch 'master' of git://github.com/melinath/philo

* 'master' of git://github.com/melinath/philo:
  Added slug to the context for ajax searches.
  Added search.result_template to the context for search views with ajax enabled.
  Added support for limit_choices_to use in the ModelLookupWidget and switched its output generation from concatanation to array joining. Corrected Page.clean_fields method's handling of the exclude kwarg.
  Added sortable_field_name to the collection member inline for grappelli.
  Set GoogleSearch to allow default args and to default to a search within the current site.