Updated the zeke poison shells with an adaptation of some work for TSP Neo:

Poison canister trails now have better animations and aren't synchronized in animation so they look much better.

Poison clouds now have better death animations and now deal damage as long as they're visible, not only until they start fading out. This should make it easier for the player to judge when its safe to pass (since in this and previous versions the poison gas clouds would all enter their death state at different randomized times.)

Both poison gas canister trails and poison gas clouds now use inventory jump states rather than A_PoisonBagCheck, which gives greater control over how long they linger.