increase delay waiting for wheel job to start

fixes #1543
Merge pull request #1575 from reaperhulk/more-delay

increase delay waiting for wheel job to start
Removed some deprecated code
Removed documentation for features which were removed
Merge pull request #1577 from alex/remove-deprecated

Removed some deprecated code
Merge pull request #1578 from alex/remove-deprecated-docs

Removed documentation for features which were removed
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