Add Ethereum name or address to package.json

I would like to see an Ethereum name or address added to the `ethereum` field of the package.json file. This will allow consumers of the project to know a cannonical address to send funds to. For example, I'm building an application that will allow developers to automatically donate ETH to all of their npm dependencies that have Ethereum addresses in their package.json files: https://sustainus.io (not quite ready, alpha soon)