[Libreoffice] Easyhack : updating biblio.odb

[Julien Nabet]

Hello,

I updated biblio.odb, commited and pushed it. There are less references 
than before but I didn't want to put books published before 2008. 3 
years in computers art, it's quite a lot, but it's just my humble opinion.
I tried to put several languages :
- English
- French
- German
- Polish
- Italian
- Spanish

If you're ok with biblio.odb, i can put this easy task as completed. But 
perhaps, you think there's not enough or something else (typo, etc..)
Tell me !

Julien.