Git commits in Moodle 3.1.3 by Michael Aherne

commit 4eab05dfc5118a52f3725b64aaa69a2b2a662226
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Fri, 04 Nov 2016 19:32:21 +0800
Tag:    v3.1.3

MDL-56755 assign: Improve documentation of assign::get_grade_item()


commit 9263132f8d6a78ec6f7400bb17c8735ea9cbfeac
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Thu, 03 Nov 2016 21:59:13 +0800
Tag:    v3.1.3

MDL-56668 competencies: Correct namespacing of coding_exception


commit 7e47b00c34af08397018c9eda43fca43df1436b6
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Fri, 07 Oct 2016 16:37:07 +0800
Tag:    v3.1.3

MDL-56319 blocks: Observe empty default blocks setting


commit d0f145c0d5d61be69b75199853b17ebf02e4b34f
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Fri, 30 Sep 2016 21:49:46 +0800
Tag:    v3.1.3

MDL-56220 cache: Call static method correctly


commit 6e4ad85606ccc5f9ca271eeafc1eef568ed6b0be
Author: Michael Aherne <michael.aherne@strath.ac.uk>
Date:   Tue, 27 Sep 2016 19:25:06 +0800
Tag:    v3.1.3

MDL-56131 choice: Set maximum lifetime for lock