Heroic gog support (PhilipK#72)

* Only use icons if they exsists

* Initial gog support from heroic

* Find gog linux games

* Update readme to include gog games

* rename appName to app_name

Make function public

Bigpicture optimization (PhilipK#69)

* Download icons  when not in bigpicture mode

Set the install path for heroic games

Proton support (PhilipK#64)

Enable proton for heroic games

Make orders strings instead of usize (PhilipK#63)

Make orders strings instead of usize (PhilipK#63)

Filter out NSFW images

If people whant that, they can add them manually.
It should not be something that happens automatically.

Steam collections (PhilipK#60)

Fix itch duplicates (PhilipK#59)

Fixes this issue PhilipK#58