Patch 0.7.2

- zombots in dungeons now scale twice as fast - removed physics from pickups, should fix most issues - corrected upgrade for shotgun from "pierce" to "knockback" - added upgrade to heavy metal to increase "reverse time" - trait loot window no longer throws nullref error (breaking the game) - tweaked colliders to prevent enemies from getting stuck on them - fixed knockback - added a delete save function. The old save will be saved as .old. To delete your save click and hold with your mouse, on the version number in the options menu!