Store the MD5 hash in a file along with the files downloaded from GOG#19

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gatl wants to merge 5 commits intoKalanyr:masterfrom gatl:md5file

+453-438

Commits on Jan 1, 2020

Removed trailing whitespace.
gatl
committed
Ensure a space after a comma
gatl
committed
Remove double spaces from the code
gatl
committed
Add possibility of using the long_title as directory name of game
gatl
committed

Commits on Jan 4, 2020

Add the possibility of storing MD5 hashes along with the files
gatl
committed