MDL-46116 mod_imscp: Don't create links on items without content.
MDL-46116 mod_imscp: Display first item with content on load.
MDL-46116 mod_imscp: List children if no content in item.
MDL-46116 mod_imscp: Fix codechecker issues, some moodlecheck issues.
MDL-20365 auth_db: Add salted crypt() password hash option
MDL-48064 atto_editor: Check if activeElement is child node in isActive
MDL-35494 core_backup: fixed activity restoration issue
MDL-48180 mod_assign: By default do not count 'new' submissions
MDL-47601 core_backup: ensure removal of automated backups
MDL-48246 theme: Fixed typo in 'hidepanelicon'
MDL-48259 questionlib.php: remove functions deprecated in Moodle 2.1
MDL-48259 questionlib.php: remove functions deprecated in Moodle 2.6
MDL-48064 atto_editor: Expand event subscription for saving selection
MDL-38343 cache: better test server strings
MDL-48265 feedback: Added alt text to ghostscript test image
MDL-48252 scheduled tasks: file_temp_cleanup_task does full delete.

This scheduled task was previously only doing a partial delete
due to the fact that the directory modification time would be
updated when a child file was deleted. It would then have to
wait another week before that directory could be deleted.
MDL-45867 atto_equation: Change preview update to asynchronous
MDL-23538 backup: tidied up phpdocs + coding style
MDL-48277 css: initial csslint config file

Will throw errors about invalid CSS
MDL-48277 css: remove empty CSS files

To avoid tools moaning and uncessary file loads
* course/style.css was mistakenly added empty in 01e0e7044
* theme/canvas/style/question.css has been empty since 2.1 481dc639