** Changed version into 3.1.6
** Added entity for Illusion event participant groups
Merge branch 'devel'
** Changed version into 3.1.7
** Bumped version into 3.1.8-SNAPSHOT
Merge branch 'devel' into FTR-156_ILGRPS
** Renamed IllusionEventParticipantGroup -> IllusionEventGroup
** Added IllusionEventGroupMember entity
** Added DAO classes for IllusionEventGroup and IllusionEventGroupMember
entities
** Fixed error message on IllusionEventAccessPermissionCheck
** Added IllusionEventGroupController
** Added Illusion REST service and implemented end-point for creating
groups
** Added view for managing Illusion event groups
** Generalized getParticipantDisplayName into
AbstractIllusionEventBackingBean
** Fixed bug in Illusion participants view that caused nameless
participants to be displayed completely without name in ui
** Fixed bug in Illusion event participants view that caused last
breadcrump item to be disabled
** Fixed integration test sql scripts