Initial check-in. Should've checked-in the files back when they were
working. Oh well.
Current, working (but not with ~/.yubico/authorized_keys yet) pam module for Yubikey.

LESSON: FOR GOD'S SAKE USE %c IN THE URL TEMPLATE
AAAAaaand now ~/.yubico/authorized_keys works.
Merge remote-tracking branch 'gh/master'
Fixing a bug; _openpam_debug no longer seems to exist..?

WARNING: As you can see, this module used to just print your password out in
your logfile. Srsly, proof-of-concept okay?