Impress Guide 3.5 published

The LibreOffice Impress 3.5 user guide (complete) is now available in
PDF and ODT from the wiki.
https://wiki.documentfoundation.org/Documentation/Publications#LibreOffice_Impress_Guide

I found very few bad cross-references in this book, so I decided not
to wait for someone else to check it. Of course, if someone spots any
problems, let me know and I'll fix them and resissue.

Thanks to PeterS for his great work on this book. I'll be publishing
the printed edition asap.

--Jean