Convert username in pyPlayer and pfKIMsg to a plString
Convert plDXShader's error string to a plString, and do some cleanup
Convert anim name in plAnimStage to a plString
Cleanup: Don't pass a writable scratch buffer off to dozens of virtual
functions -- that's just silly!
Convert plLoadAgeMsg's age filename to a plString
plCloneSpawnModifier template name => plString
Movie filename in plMovieMsg and plBinkPlayer => plString
pfGameGUIMsg => plString
Clean up DisplaySystemVersion() to avoid hsStrcpy, and add Windows 8.1
to the known versions decoder.
proVariableEventData name => plString