Ignore DLC count information for specific games by using a list of games that we know have DLC.
GOG reports wrong DLC count information for many games. By using a list of games that we know have DLC we can ignore DLC count info that GOG provides for those games.
User can use local list ($XDG_CONFIG_HOME/lgogdownloader/game_has_dlc.txt) or use remote list by using the new "--dlc-list" option.
The list uses same format as blacklist.
