Merge pull request #281 from AlCutter/go_scanner

Let Go log scanner match on cert serial number too.
Print the CT logs list even when it is unsigned.

Changing the Python log list utility to allow skipping the signature check, as we now distribute an unsigned list of all known CT logs.
Fixing Python scanner.
Python Scanner: Shutdown multiprocessing manager

This fixes the scan_log function to be re-entrant.
EV whitelist utilities: Adapt for use as importable modules

This modules are intended to be used by another utility that will produce
the zip file to upload to the Chrome store.
To avoid flag collision, these flags were simply removed.

Also, the output directory flag is passed in as a parameter rather than a
flag.
Checks for existence of ocsp and crl pointers.
TLD list.
Added checks for not well defined expiration date.
Added more methods to cert
Added get_extensions method.
Changed cert_db to use Certificates and log_ids.