MDL-37942 Images with non-alphanumeric chars in file name won't export
MDL-38361: Fixed typos in mod/assign/locallib.php
MDL-39033 Conditional availability: Available items dimmed to students
MDL-34939: Fix clamdscan permissions-related issues

Use --fdpass parameter that passes the file descriptor permissions to clamd,
which allows to scan given file irrespective of directory and file
permissions. Changing file permissions is not required.
MDL-39135 assign_feedback: fix missing renderer argument

assign_user_summary expects extra profile fields
MDL-39163 usability: New Moodle icon
MDL-39163 repository: Make use of the new Moodle icon
MDL-38710 assign: fix missing setType calls
MDL-38710 assign: convert selectedusers to PARAM_SEQUENCE

This param type is more appropiate.
MDL-38710 assign: Fix one typo and change one param to PARAM_BOOL
MDL-39185 mod_forum: declare new object before creating member variables to prevent Strict Standards warning
MDL-39167 quiz access rules: need to validate their settings.

We were missing the hook in the form validation method. We had them
everywhere else they were needed.
MDL-38777 JavaScript: Remove YUI cache persistence

The cache does not need to be persistent within the same request and this
just holds memory open for no good reason.
MDL-39206 theme_bootstrap: Added resized/opaque screenshot.jpg
MDL-39211 forgotten include of /course/lib.php
MDL-39219 mod_scorm - replace JSON with Y.JSON for IE7 compatibility
MDL-39084 grade: Capability checks are incoherent for the Course grade settings section
MDL-39220 Javascript: Editor shrinks using collapse button
MDL-39164 GIFT, Blackboard and Examview import of essay questions broken
MDL-39172 Import of .dat files is broken in blackboard_six import format