Allow access to additional mod specific world based properties
Used by FML to store mod list associated with a world, and maybe an id map
Used by Forge to store the dimensions available to a world
Sets the state of this event, not all events are cancelable, and any attempt to
cancel a event that can't be will result in a IllegalArgumentException.
Sets the result value for this event, not all events can have a result set, and any attempt to
set a result for a event that isn't expecting it will result in a IllegalArgumentException.
How high this entity can step up when running into a block to try to get over it (currently make note the entity
will always step up this amount and not just the amount needed)