All current changes in a random order//Contains unfinished work:

- Editor: Item duplication
- Editor: System line separator
- Delta sheets now return NOT_MODIFIED or MODIFIED if it handles a string
- Added fade calculator; for use with Timed Events and pseudo-Streams
- Added unfinished class for pseudo-Streams
- New sheets: GUI, Player Armor, Ride/General, Ride/Horse, Player Hitscan, Player Leash
- Added warning if the player didn't install/enable a resource pack
- MAtmos uses TempLiteKey instead of LiteBase
- Fixed some entries in the Legacy Sheet Index