Added the BulletinInfo class, which represents the Bulletin client
version.
Added .getAssocProblems() to Bulletin.
Added BulletinInfo to CompetitionInfo, added the CompetitionChangeAction
for it, and added the handlers for the BULLETIN_ADDED/BULLETIN_REMOVED
events. Bulletins are now _implemented_ except for CompetitionInfo event
calling.
Added the BULLETIN_ADDED/BULLETIN_REMOVED events to CompetitionInfo.
CompetitionInfo now calls these events.