Remove UDP
Add script to provision new client to existing container.
Scripts to wrap the docker incantations.
Fix openvpn config so that certs are not self-signed.

Also general cleanup to make ca cert/key filenames a bit nicer.
Add serial number file to openvpn directory.
Specify connection params in new_client script.
Add more helper scripts; one to attach to the container when starting.
Split OpenVPN server cert from CA cert.
Update .gitignore.
Implement CLI args in helper scripts.

Lots of refactoring for code clarity.