- Added three new types of space constraints: room(s) pair of mutually exclusive time slots, room(s) pair of mutually exclusive sets of time slots, and room(s) occupy(ies) max sets of time slots from selection (suggested by Rodolfo Ribeiro Gomes). On this occasion, there were added the general constraints (for all rooms, not only for a single room, as in the previous versions) of type rooms max activity tags per day/real day/week. - Minor bug fixes and improvements.