Make phantomjs a production dependency

[apeckham]

I moved phantomjs to dependencies (not devDependencies), because node-lambda skips devDependencies with "npm install --production", so phantomjs was missing from node_modules in the zip file.

Without this change I couldn't get "Hello from phantom" to work in the Lambda console.

Thanks!

[justengland]

The reason it is a dev dependency was that allows me to use npm install locally and run the project on my make. It is supposed to pull in the amazon linux dependency in manually so it can run both on my local machine and also work remotely as well.

I have never really been a fan of the developing using the Lambda console, it is not as nice as my local machine for development.

I have been working on revamping how that stuff is pulled in so it will be a little more seamless, until that is finished feel free to fork the repo and make the change.