Add IPv6 support.

Authored by mordervomubel ( https://github.com/mordervomubel )
GitHub issue webpy/webpy #70
Added doctest for validip and validaddr
Merge pull request #196 from mordervomubel/master

ipv6 doctest for validip and validaddr
fix typo
Merge pull request #203 from asldevi/master

fixed sending email through AWS
Merge branch 'master' of https://github.com/webpy/webpy