Imports
- github.com/GeertJohan/yubigo
- github.com/boltdb/bolt
- github.com/codahale/chacha20
- github.com/codegangsta/negroni
- github.com/dgrijalva/jwt-go
- github.com/gorilla/mux
- golang.org/x/crypto/bcrypt
- golang.org/x/crypto/pbkdf2
- golang.org/x/crypto/ssh
- golang.org/x/crypto/ssh/terminal