Git commits in Moodle 2.6.4 by Andrew Davis

commit dbf541f8e119ad55c27800da053f050ca7aa430b
Author: Andrew Davis <andrew@moodle.com>
Date:   Tue, 24 Jun 2014 11:53:34 +0800
Tag:    v2.6.4

MDL-46036 mod_survey: added logic to prevent user trying to download when there are no results


commit 5636246c956f8449c86636bab7f703afd583c198
Author: Andrew Davis <andrew@moodle.com>
Date:   Fri, 20 Jun 2014 12:58:48 +0800
Tag:    v2.6.4

MDL-42467 mod_data: added code to delete cached RSS feeds when database or glossary entries are deleted


commit f87c07303958fbac9290a5b99d0ba9725b1744c8
Author: Andrew Davis <andrew@moodle.com>
Date:   Thu, 19 Jun 2014 11:32:37 +0800
Tag:    v2.6.4

MDL-46035 mod_survey: a string change to make an error message always correct