Put files in a top-level directory in the release .zip

[Athanasius]

I see the EDRv2.4.0.zip doesn't have a EDR (or similar) top-level folder containing all the files.

This makes it all too easy to make a mess in a user's plugins folder if they forget about this when unzipping.

[lekeno]

By default Windows offers to decompress in a sub folder named after the filename. Some folks might end up with a folder named after the version they started with but that's OK because from there on, the auto-update should take care of the rest.

For folks who know their way, they might choose to "extract here" and end up with files at the top of the plugins folder. I'm guessing that this is less common. I'm also not sure how the auto-update would work as seamlessly as it does today if I were to add a top level EDR folder which may or may not be kept as-is. I'd have to manage 2 archives: one for the manual install (with the EDR top folder), and one for the auto-updates (without the EDR top folder and meant to be extracted in place).