* Added USERFLAG class to manage user flags
* Added USERSOUND class to manage sounds
* Added SET_BASE:GetSetNames() to return an array of the object names of
a Set. (Created dynamic lists based on mission editor groups defined).
* Added SET_BASE:GetSetObjects()
* Revised the Messages
* Optimized the code for GetScannedCoalition
* Markings text optimized for ZONE_CAPTURE_COALITION. Now the owning
coalition is also shown.
* Removed the stupid naming of messages to coalitions.
