grenade trajectory graphic

grenades display their trajectory, to help you aim
  I'm might get rid of it, but for now we'll try it out

several duplication tech give slightly lower duplication chance
strange attractor now properly includes all your tech in duplication chance (it wasn't updated for recent duplication tech)

js/spawn.js

@@ -2379,10 +2379,10 @@ const spawn = {
             this.checkStatus();
         };
     },
-    pulsarBoss(x, y, radius = 90) {
+    pulsarBoss(x, y, radius = 90, isNonCollide = false) {
         mobs.spawn(x, y, 3, radius, "#a0f");
         let me = mob[mob.length - 1];
-
+        if (isNonCollide) me.collisionFilter.mask = cat.bullet | cat.player
         setTimeout(() => { //fix mob in place, but allow rotation
             me.constraint = Constraint.create({
                 pointA: {