fix Kindlegen download for Linux

[mojavelinux]

No description provided.

[mojavelinux]

Not the prettiest way to fix it, but it gets the job done.

[mojavelinux]

I also recommend renaming the folder to asciidoc-to-kf8-example. Using both epub3 and kf8 is redundant as kf8 is a (bastardized) type of epub3.

[rwinch]

Thanks merged!

The reason I have it as epub3-kf8 is because eventually the sample will output both formats since that was what was requested in asciidoctor/issues/13

Does that change your opinion on the name? If so, what might you suggest?

[mojavelinux]

Oh, I see. I was thinking you were creating a parallel project instead. Once you merge it upstream, I recommend simply using the name "epub3" or, if you want to keep it more generic, "ebook".