Cavity Busters Update 35 patch 5

Hiya! I have another batch of fixes and tweaks. Mainly minor stuff. Enjoy! :)

• fixed a bug where gob upgrade would lock doors on a loop
  
• fixed bug where gob upgrade would lose effect when looping
  
• fixed bug where ammo upgrades wouldnt spawn on a loop
  
• fixed a few bugs with jam boss where it would take longer than usual for the second phase head to drop
  
• increased the chance for ammo room to spawn
  
• you can no longer teleport out of room when the shop keeper appears
  
• nerfed shop keeper a little bit