Add basic boilerplate script

With the comic templates from tools/gen_comic_reader.sh
Remove gen_comic_reader.sh

Replaced by tools/boilerplate.py
The templates in it are outdated (the test import for example),
hard to maintain, and do not follow PEP8.
Also, boilerplate.py already sets more fields.
Start a "base" recipe

This probably needs to have a "pages" templates too.
Make the "base" recipe more complete