[Core] More research into the mechanisms of the Dungeon Finder.
It will probably take much longer than initially expected to complete
the system.
[Scripts] Implement Yogg-Saron illusions dialogues
Please note that this contains a lot of guesswork and it's based mostly
on information from wowwiki and some video parts.
However the event is pretty close to what it actually should be.
Credit to @xfurry [3034]