Voice biometric authentication PAM module for Linux

1. Create two directories audio/ and audio_models/ in the parent directory
2. Run ./voiceprint-setup.sh and ./install.sh
3. Put auth sufficient pam_voiceprint.so in any pam files you want in /etc/pam.d/ (i.e. /etc/pam.d/sudo)
4. Try it with sudo -l :)