New Experimental Patch (v516)

Hi everyone,

Pushed through some more bug fixes from last experimental build. Please let us know if any of these don't appear to be working!

• Archivists should now drop all item types
  
• Buying on-use items at vending machines should once again make current on-use item appear on the ground
  
• Steam achievements should work again (previous achievements should carry over retroactively when you go into the stats page)
  
• Save functionality reverted - can only save on Level Select now
  
• Dying on Hard Mode Imaginaries should reset movement speed
  
• Controls for on-use items and chalk should no longer overlap