README: broken link "gopass"

[onlyjob]

https://github.com/bgentry/speakeasy#license refer to "gopass" but the link is broken...

[aerth]

code.google.com/p/gopass as well as other code.google.com things are gone, gone, gone....

only thing i could find was on go-search

Here is the author of the original Go unix Getpasswd(), RogerV on the go-nuts group http://archive.is/UtxBh

I think the http://go-search.org/view?id=code.google.com%2fp%2fgopass link may be a better one for the readme

edit: seems that go-search website is gone, too.