Use new tagging system

[rgaudin]

In order to support the new tagging system, please make sure your reader:

• is feeding itself from the OPDS stream (using a local cache/copy or not) Introduce support of OPDS catalog #1203
• is using the centralized Categories List Filter library by category #500
• is using the lastest libkiwix (not released ATM). It supports new options and includes the backward-ompatibility bits you'd need. done
• is using the new tags only for flavours and full-text index. See task New standard tags should be interpreted properly #1574

NOTE: This issue for planning purposes, OPDS and libkiwix does not support those features at the moment.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be now be reviewed manually. Thank you for your contributions.

[kelson42]

Closing in favour of other dedicated tickets. See description.