This is my proposed solution for#51

It seems silly to force people to create directories with only one file in them if they just want to upload one file.

At the same time, I don't feel comfortable adding metadata such as "this should actually end up being a compressed zip file with a custom file extension" — wharf works on folders/file hierarchies.

It looks like diffing .jars (also zip-based) doesn't yield too bad results?http://myrealitycoding.github.io/2016/05/31/deploy-to-itch.html — if someone has subsequent builds of a .love game, I'd be curious to try diffing them.