GOG changed part of the API which caused lgogdownloader to not get valid file name.
Change galaxyAPI::installerJsonNodeToGameFileVector and galaxyAPI::extraJsonNodeToGameFileVector to get proper file name.
Game details are now acquired using Galaxy API.
Allow using most features without valid downloader API login by changing Downloader::isLoggedIn to return false only if website is not logged in.
--download-file still uses old API and will not work without valid API login. Downloader::downloadFileWithId prints error message and exits if user doesn't have valid API login.
Game details cache version is incremented because of changes to gameFile class.
Show product id for DLCs when using --list-details option.
Rewrote Downloader::repair to remove duplicated code.
Fixed serials containing <br> tags.