Major Bug Fixes

Changelog:

+Fixed missing textures in Mengele Labs
+Fixed progression bug In Mengele Labs that sent the player into the incorrect timeline by taking a shortcut
+Fixed a missing texture in hub world after the assassination mission
+Made backtracking platforming more intuitive in hub after assassination mission
+Fixed a bug causing player to lose assassination mission progress after entering boss arena side quest
+Deleted duplicate assassination quest maps
+Fixed code for broken toilets in specific areas and updated urinal sprites