New default config

[Vitaly Mayatskikh <v.mayatskih@gmail.com>]

Hello!

It might be a good idea to ship Wl with actualized config.

Nowadays a lot of people use Gmail, so new config should be sharpened
for immediate use with Gmail. Also there can be several different
accounts, i.e. the corporate one with usual whistles and bells, like
LDAP. Problem with `@' in user login name also needs to be
mentioned. And not forget to solve umlaut problem.

Does anybody like to write such config, with careful comments? This
will really help to spread Wl, because Wanderlust setup is not so
easy, even for us, geeks.

Thanks!
-- 
wbr, Vitaly