frequency doubling

some tech is now only 50% likely to show up
  I choose about 25 tech that don't effect game play as much, and dropped them down to 50% frequency

reset on experiment menu should now clear power ups and bullets

fixed bug with no heals

js/powerup.js

@@ -680,7 +680,6 @@ const powerUps = {
         if (
             (!tech.isSuperDeterminism || (target === 'tech' || target === 'heal' || target === 'ammo')) &&
             !(tech.isEnergyNoAmmo && target === 'ammo') &&
-            !(tech.isNoHeals || target === 'heal') &&
             (!simulation.isNoPowerUps || (target === 'research' || target === 'heal' || target === 'ammo'))
         ) {
             powerUps.directSpawn(x, y, target, moving, mode, size)