Add tracing information to c source and Perl source

With this, you can do:

  ./bin/ScottCurses -a games/name_of_game.dat 2> c_trace.txt
  ./bin/scott.pl    -a games/name_of_game.dat 2> perl_trace.txt
  diff c_trace.txt perl_trace.txt

And with that, if there's any divergence of behavior, you'll see it in the
trace. The downside is that you will have to manually maneuver to the correct
game play area to see what's going on.
Don't let someone pick something up if they're carrying too much.
Oops! Forgot to increment the action counter.

This fixes a bug where many informational messages wouldn't be seen because
later the $doagain variable would get reset.
Fix the darkbit value.
More tracing information.

(It appears that Look() is getting missed, but I know what that is and I'll
fix it later)
Fix the output of "SCORE" for adventures.

Also, remove an unused variable.