As mentioned in bug report #16, go-epub can't append a subsection to a subsection.
Another bug we found is that currently goepub cannot append section to above level one.
This PR will fix these bugs and refactor the logic for a better approach.
TODO:
[ ] add function that we need
[ ] update unit tests
currently fixing this bug on my local machine, this todo list will be complete when I add more commits.
As mentioned in bug report #16,
go-epubcan't append a subsection to a subsection. Another bug we found is that currentlygoepubcannot append section to above level one. This PR will fix these bugs and refactor the logic for a better approach.TODO: