Here is a patch to add epub support to doc-view, via the mutool command of the mupdf library,I guess the patch needs no further explanation. I've read the info about sending patches, however, I don't understand the section about the changelog (it mentions that there is a changelog or something, but it doesn't say where). Also, the info tells us to write the commit log entries, but it does not say where to do this.Looking at the changelog files, I guess that info is just really outdated (am I right?).Anyway, the patch is in the attachment. If there is some part of the 'protocol' that I did not understand then please inform me about it. Thank you