Check for failed postconditions
Merge remote-tracking branch 'origin/CR_failed_task'

Conflicts:
	discolog/bin/fr/limsi/discolog/Discolog.class
	discolog/java/fr/limsi/discolog/Discolog.java
	discolog/lib/disco-api.zip
	discolog/lib/disco-src.zip
	discolog/lib/disco.jar