Fix incorrect preg_quote usage.
Remove old simpletest tests.
Fix the equivalent of MDL-35343 for oumultiresponse.
Remove obsolete lang strings.
Fix codecheker issues.
Add a test script.
Bump version number.
Merge remote-tracking branch 'ou/master'

Conflicts:
	simpletest/testwalkthrough.php
Fix incorrect foreign key declaration
Update readme.