load 2.4 reviewed code
load 2.4 reviewed code
fix ISO switch for CSV, fix lang strings
relocate files
add missing DB Moodle 2 conversions
Merge branch 'MOODLE_24_STABLE'

Conflicts:
	lang/de/report_trainingsessions.php
	lang/en/report_trainingsessions.php
	trainingsessions/lang/en/report_trainingsessions.php