[Gimp-web] FAQ Overhaul

[David Marrs]

Dear gimpers,

The FAQ had a few cobwebs in it so I gave it a dust. It should feel more 
up-to-date now and actually relevant to version 2.2.

If you can think of any frequently asked questions that should be added, please 
let me know or (better yet) add them yourself. Same applies to anything that 
should be removed.

Finally, it would be nice if a link to the FAQ could be added to the message 
footers and/or to an auto-generated list etiquette monthly periodical.

Regards,
David