changed clipboard transformation to maintain compatibility with FAWE
removed restrictions that parallel cannons only fire if they are on target. Cannons which could fire in the direction the player is looking will fire. The master cannon the player is operating will always fire.
added time delay for disabling the aiming mode when the player is too far away to avoid issues with movecraft
added particle effects for impact location of projectiles which can be seen from distance as alternative to glowstone
fixed problem with null check for projectile traces if a world was deleted