Students now care about obstructions when dodging

I believe I fixed the bug with Hamerschlag blinking.
Students will now treat obstructions equivalent to 3 projectiles each.
Students can now only see projectiles/obstructions that share a quadrant with them...
This may not be ideal, as it makes their capacity to dodge vary wildly...
Maybe in next build, give students a line of site that only lets them see to the front and sides.