[PATCH] Add support for XKCD-style wordlist passwords

[Tobias Girstmair]

I think there is a place for rememberable passwords in a password
manager, for example credentials for logging into a graphical session
(where you can't (easily) use a password manager).

I do think that this is better made an extension than implemented into
pass itself though. This would allow greater freedom in choosing
dependencies and including wordlist(s).