Elliptic curve interfaces
Use @six.add_metaclass(abc.ABCMeta)
Add signing and verifying interfaces
Flesh out EllipticCurveSignatureAlgorithm
Fixup how the digest algorithm is sent
Update docs
Bump to 0.5
Removed signer/verifier from signature algorithm
Separate ECC key material from operations
Add docs for EC numbers
Add __init__ arguments to docs
Remove key_size from EC keys docs
Add EC docs to the index
Rename private_key to private_value
Make EC key interfaces backend specific
Remove secp from spelling dictionary
Test EC public numbers type error
doc8 fixes
Apostophe
add RSA private key generation restrictions to primitive layer