Git commits in Moodle 3.3.5 by Tim Hunt

commit bfe824dd3d5f930ca665430b588b9f4cfa9131f8
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Tue, 06 Feb 2018 20:09:43 +0800
Tag:    v3.3.5

MDL-61366 setuplib: safely construct the ajax renderer when needed

commit 4a108f79a8d30c25a7d787c07f292a33caa0519b
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Thu, 21 Dec 2017 01:55:57 +0800
Tag:    v3.3.5

MDL-61077 question stats: make calculations more robust