final cleanup for PEM serialization
add both types of EC key formats to parametrized test
Merge pull request #1570 from reaperhulk/final-consolidation

final cleanup for PEM serialization
who can remember where all these files belong? nobody.
Merge pull request #1574 from reaperhulk/license-files-are-hard

Add missing license files to the cryptography_vectors
Support for traditional OpenSSL and PKCS8 RSA private key serialization

This temporarily uses the backend to do it until the alternate approach
is ready. DSA/ECDSA and public key support will follow.
review feedback fixes
expand dump_pem RSA docs a bit more
update docs with enctype->encryption_algorithm and fix two links