[PHP-DOC] FAQ now in documentation

[Damien Seguy]

Hi all,

Finally, all the FAQ entries are now in documentation, en tree,
and commited some esthetics updates. Wait for the next build to
see it all new.

I recommand to translators not to start now : end of next week will be fine.

I noted, when porting the FAQ, that it is getting pretty old, and tired.
References are still PHP 3, and so. I updated some, but not too much.
If anyone meet sections that need dusting, please, feel free.

Here is it, it's all yours.
Best regards,
Damien Seguy