update AUTHORS to obscure some email

[OT: wow, feh is back after all these years! way to go!]

i am proposing to obscure all these emails, because today, putting emails in plain text is just inviting spam.

i would do the same for the rest, but i did not want to over-reach. if you agree, i will happily do it.
Merge pull request #123 from cpg/patch-1

update AUTHORS to obscure some email