Hotfix to address crash while exiting field in a friendly ship.

Updated to address crash when NPC character (spider, wolf) walks into the zone.

Increased effect zone at shield wall to suit smaller radius settings.

You know when you spend a week extensively testing a new mod, and finally get it exactly how you want it, and you can't get it to crash, so you upload it and then you open a world with one of the blocks in it and i crashes? Yeah.

So hotfix: patched an issue with existing block looking for a variable that hasn't been created 'cos multiplayer session is still loading. Also took out some redundant files and fixed a filename.

Initial commit.