Git commits in Moodle 3.2.1 by Juan Leyva

commit c6bd4c1a453945c021259287ca56f85695589448
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Wed, 28 Dec 2016 18:58:46 +0800
Tag:    v3.2.1

MDL-57536 availability: Document required selectors changes


commit e4976aefc5852dde3f883976d3254f63d1ff7519
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Fri, 02 Dec 2016 20:29:51 +0800
Tag:    v3.2.1

MDL-57255 gradereport_user: Fix default value for graderaw