code for keeping track of my extreme number of itch bundles

scripts:

* setup.tcl DB-PATH
  sets up a new database 
* import.tcl DB-PATH DATAFILE ?DATAFILE ...?
  loads the datafiles as formatted by misc/scripts.js into DB-PATH, ignoring existing urls
* mark.tcl DB-PATH ?-force? ?-timestamp TIMESTAMP? GAMEURL ?GAMEURL ...?
  marks each GAMEURL as played on TIMESTAMP, or YYYYMMDD by default. will not overwrite an existing timestamp without -force
* unmark.tcl DB-PATH GAMEURL ?GAMEURL ...?
  unmarks each GAMEURL, as if it were never marked
* stats.tcl DB-PATH ?GAMEURL ...?
  if no GAMEURLs are present, prints database stats. otherwise, prints the played status of each GAMEURL