Create new users cvs directly in class (usergroup) -ref #6680
Insert user csv in platform in a class (usergroup) with class id - ref #6680
Add file default_scorm.css -ref #6976
Merge remote branch 'upstream/1.9.x' into 1.9.x

Conflicts:
	main/admin/user_import.php
	main/inc/lib/usergroup.lib.php
Merge pull request #260 from baelmyhu/1.9.x

Insert user csv in class & file main/css/default_scorm.css refs #6680 and refs #6976