Changed the way Zeratul retains his experience/artifacts found during subsequent re-plays after completing the mission in Episode 2. Any experience earned up to that point on mission start is still subtracted from your total amount, but if that total amount is > than what is required to gain your level-up's and abilities that would have been learned on that mission on the first time play-through, Zeratul will already have them on Mission Start. In addition, if Zeratul has found all artifacts for a map, they will not appear on a replay. If he only finds 1/4 artifacts, 1 artifact will randomly disappear from map to prevent duplication of getting more artifacts than possible, same goes for 2/4, 2/3, and so on.
Fixed some possible issues in early Episode 2 missions with Zeratul not starting at 100% health
Map Launcher
Added Protoss Episode 2 achievements to the achievements button menu for tracking and reviewing
Fixed a bug that would prevent the opening music for playing
