Add dual keys, keys that encrypt and sign
Allow dual keys to work with boxes
Add save method to basekey
bump version to 1.1.0
Add docs for key saving
Don't shadow class vars
there is no wb! just rb :)
Add libnacl.utils.load_key
import needed libs
Move basekey into libnacl.base
use the new basekey location
use new base key location
Use new basekey location
use new base key location
Add utf line
sign, not seed!
sign, not seed again
Add pk and vk to dualkey
Add tests for dual secret keys
Add signing tests to dual tests