Defficiency: Virology fixes.

Virology now actually starts with 3 random virus samples.
Removed a stray slash from a file.
Fixed a runtime with syringes trying to get the len of a 0 var.
Fixed clean_map_git not referencing the right files.
Undo map changes.
Merge pull request #2017 from ComicIronic/VirMapFix

Maptools and bugfixing.