Allow to overwrite config with CLI arguments

[timolins]

It would be nice if the CLI arguments are respected, even if there is a config.cep.js or cep inside package.json. At the moment they are only used when there is no config present. In my case I want to overwrite a single setting, but use the config for the rest.

Any thoughts? If you want I can have a look at this.

[vespakoen]

Thanks for reporting this.

I'll rework the whole config loading soon.