Remove API Keys

[erikringsmuth]

You should probably move API keys to a separate config file that isn't checked into the git repo.

Ex: https://github.com/jsonresume/registry-server/blob/master/server.js#L17

nconf is a good tool for this https://github.com/flatiron/nconf.

[thomasdavis]

aha was waiting until someone noticed, we are using ENV variables for most things but I got lazy and committed my PDF conversion key

[thomasdavis]

The whole server was a rapid prototype, needs a refactor