[AD] Authors file cleanup

["Eric Botcazou" <ebotcazou@xxxxxxxxxx>]

The patch below cleans up a bit the AUTHORS file by:
- removing the unnecessary trailing spaces,
- unifying the structure of the lines: only one sentence, items separated by
commas, terminal 'and'.
http://www.multimania.com/ebotcazou/dev/thanks.zip

I'm also considering turning all e-mail addresses into English expressions,
for example:
    Annie Testes (<email>annie at kezako dot net</a>).<br>

Grzegorz, could this be automated by makedoc ?

--
Eric Botcazou