Made miniturret default search radius reasonable
Modified ArenaBounded, added DestroyOutsideArena

ArenaBounded now must be on an entity for it to bounce off arena walls.
Added projectile spread to projectile weapons
Tweaked and added minigun defaults
Explosion now only affects CollisionPhysics
Made shotgun recoil consistent with rest of weapons
util.table.clone is now a deep clone

ie. It clones all tables in the table and all tables in those tables,
etc.
Updated test.lua