EasyBallistics plugin

1.5 is on the way. No massive changes this time, just small improvements to fix various problems users had.

-Some users had trouble with weapons implemented as separate actors shooting the actor they’re attached to. So in 1.5 there’s an option for the bullet to ignore anything the launching actor is attached to (and optionally, anything else attached to that actor).
-If you want bullets to pass through some objects, but don’t want to bother with complexities of the collision filter, bullets now have a simple list of ignored actors.
-Bullet mesh can now have random initial roll and maintain it throughout its flight.