fix for unchanged values, therapist manual

- fixes the issue where tabbing through the numeric text boxes, without
changing anything results in a notification that the save failed because
no new value was passed in.
- updated therapist manual to latest version
fix for issue #72

fixes mismatch between diseases for graphics packs and primary file
Merge remote-tracking branch 'splinterz/master'

* splinterz/master:
  fix for issue #72
  fix for unchanged values, therapist manual
forum-patchlog.pl: Patch messages now display author. #dev
Merge branch 'master' into unified

* master:
  forum-patchlog.pl: Patch messages now display author. #dev
  fix for issue #72
  fix for unchanged values, therapist manual