Adds --nokepub parameter to kcc-c2e.py

[soda3x]

This adds a --nokepub parameter to kcc-c2e.py. My rationale for adding this is as follows:

• I use KCC in a docker container which is a simple script that watches a comic directory for new comics and then calls KCC to convert to EPUB so i can read on my Kobo reader.
• I use Komga to host my comics
• Komga has recently introduced kepubify to automatically convert epub --> kepub
• As this tool, before this pull request, outputs .kepub.epub, Komga / kepubify gets a bit confused and tries to do .kepub.epub.kepub.epub or something similarly foolish and just freaks out that it's not a valid extension (fair enough)

I think this tool is great and I'd love to have the flexibility of generating just epubs with this change :)

[axu2]

Got to be honest, I've never tested the kepub parts of the code or know much about kepub as a kindle user, but I feel like just changing the extension is sus. Wouldn't it be more appropriate to change kepubify to ignore things that end in kepub.epub?

EDIT: OK, looking at KCC code, it seems KCC really does just make an EPUB and rename it to kepub, so I guess this PR is fine from a technical perspective so I don't mind merging. Still seems a little strange though, which do you think is better? Change KCC or change kepubify?

[soda3x]

@axu2 yeah it's a bit weird, it seems to be a convention thing. This is definitely the easier of the two options! Thanks for merging :) Appreciate this software

[axu2]

@soda3x thanks for the contribution! If you have time take a look at our backlog of Kobo issues.

[axu2]

@soda3x do the kepubs made by kepubify support bookmarks or annotation?

• The bookmark function cannot be used for epub using the new firmware of kobo4.32 #418
• Kobo bookmarks and note taking annotations disabled #704

[soda3x]

@soda3x do the kepubs made by kepubify support bookmarks or annotation?

• The bookmark function cannot be used for epub using the new firmware of kobo4.32 #418
• Kobo bookmarks and note taking annotations disabled #704

I can have a look once I'm home :)