Fix a small issue on 32-bit machines.
Add AUTHORS and CONTRIBUTORS files.
Add a CONTRIBUTING.md file.

This is shown when starting a pull request on GitHub, so we can use this to provide some guidance to would-be contributors.
Flesh out error responses in RFC
Add log inclusion proof checking.
RFC6962-bis: Require log submitters to verify SCTs (issue #2)
Java support for entry retrieval
review changes1
fix warnings
Add Venafi, Inc. to authors