incorporate lotw-needed as internal functions.

ALLmon now automatically fetches the LoTW awards page for themode
you start with and now monitors for band changes; states you need
are automatically loaded from LoTW when you switch bands (for
WSJT-X's ALL.TXT only; now requires your LoTW credentials).

The args to ALLmon have changed; the only argument is now a WAS
award page name (e.g., 'WAS-20-JT65', or anything in the pulldown
menu on the LoTW Awards page).

Still need to fix startup to fetch needed stats for the report
named (main(), lotw_awards_needed()).