Fix the "Crash on Exit" bug

We were throwing away the Dispatcher before all the keys (namely, leaked
keys) were unloaded. See the comment in plResManager for more details.
Replace plasmalog with a better debug log

Plasmalog.txt is now plasmadbg.log. This allows us to view the log inside
the game, flush to the debugger output window, and have the logfile. The
plan is to redirect key leak reports to this log in a future commit.
Remove Cruft
Fix issues from review

- Delete the TypeFilter pointers