Update README and convert it to Markdown format
Replace util::ReadPrivateKey with Services::ReadPrivateKey.

They were almost identical, including for the bug (leaking a FILE when the
key does not parse)!
Python: EV certs whitelist generation utility.

Use the scanner to identify and fingerprint all certificates with
an EV policy OID that chain to the correct root for thin policy.
Properly saving the output.
Linting ev_metadata.py
Linting.
Adding explanation for EV metadata.