Unzip/legacy_html options very confusing in the readme.

[bpwhelan]

Im very happy that I can move my manga around with just .mokuro and .cbz files, however, the readme is pretty confusing for this workflow.

1. disable_html should be legacy_html?
2. it's not stated the minimum needed for the reader to display manga. It should be clear that with legacy_html False, the reader just needs the .cbz and .mokuro file. (maybe i dont explain this well)

Right now, it feels like just mokuro {volume} would give me just .mokuro files without unzipping my cbz, but this is not the case.

mokuro {volume} --legacy_html False does that, which is a bit weird.