- Improve the set support: dblatex can build all the PDF files (one per book) and the xr-hyper package is used to make cross-references between books.

- Improve the XeTeX font switch macros (still experimental).

- Add some hook to external error handlers.

- Change the verbatim implementation in order to be able to easily add new elements embeddable in programlistings.

- Add the parameters:

  - glossary.tocdepth.

  - glossary.numbered.

  - refclass.suppress.

  - use.id.as.filename.

- Fix some bugs.