Quick replace of potion and oil icons with The Witcher & The Witcher 2 icons.

I will add names in the future.

Unpack to ...\The Witcher 3\Mods

Oil Icons need tweak (the other way 4 icons look the same)
Tweak edit def_item_alchemy_oils.xml - I changed path only

Okay, I added Witcher 2 icons. Don't kill me guys, I'm not some sort of a photoshop master, if there is somebody that can edit 4-5 oil icons, send me a PM

Also, I added Icons in 60x60 size (as requested by sb in a comments), but that doesn't look like it changed anything.