The `common` name is from the time where kiwix was only one repository
for all the project (android, desktop, server...).
Now we have split the repositories and kiwix-lib is the "common" repo,
the "common" directory is somehow nonsense.
This feature is considered obsolete for a while.
In fact, it was already not supported since June 2018 as we were compiling
xapian without the chert backend support.
Assume that we don't support it and remove it from the code.
See kiwix/kiwix-tools#245
This is a API break. library.xml files will still work but the indexPath
and indexType will be dropped silently from the file.
The library now contains (simple) methods to handle bookmarks.
The bookmark are stored in a separate xml file.
Bookmark are mainly a couple (`zimId`, `articleUrl`).
However, in the xml we store a bit more data :
- The article's title (for display)
- The book's title, lang and date (for potential update of zim files)
Matthieu Gautier