Git commits in Moodle 3.3.x by Jonathon Fowler

commit 4e5a22df7a66ee912bd3206963b9c20f4f9d3b47
Author: Jonathon Fowler <fowlerj@usq.edu.au>
Date:   Fri, 13 Jun 2014 08:58:55 +0800
Tag:    v3.3.0-beta

MDL-39913 filetypes: mimetypes remediation

commit 4044cad5ea062a714330e69f69c02a8407501f29
Author: Jonathon Fowler <fowlerj@usq.edu.au>
Date:   Fri, 13 Jun 2014 08:58:55 +0800
Tag:    v3.3.0-beta

MDL-39913 assignsubmission_file: add file types restriction