This could be due to the fact that the game_map object is not initialized, I'm not really sure and don't have the time to verify just yet, as I've got to be out the door. The primary problem is that the new seek_n_nav.Offense.blockade_enemy_drops() is not able to locate any enemy shipyards at this point, so bugs remain to be found.

This issue is blocking #30.

• add logging for easier debugging