Makes bleeding logic a little clearer

(cherry picked from commit 30dc2519e90a6bf08c6da7264bfba8547cb62646)
Spaceacillin now prevents wounds from transferring germs

(cherry picked from commit f3951c702c3d7154cf31e6616488e543561ba908)
Infected wounds show up more readily on the health scanner

(cherry picked from commit cdd27aec4a90c770d8d7067c4f7d8910f82fc92d)
Required spaceacillin levels no longer scale

The amount of spaceacillin required to stop infections is now a flat 5
units, instead of scaling with germ_level.

(cherry picked from commit 88f3618e9fd3ba77f2b9078412a3c12df7e66a16)