Add JSON feed of Netflix items

[yesbutwhy]

Please provide a JSON feed of all Netflix items. Original intent: get a list of items that Netflix has that the user doesn't. Expiration dates would be helpful too!

https://www.reddit.com/r/PleX/comments/3ytwdj/i_made_a_tool_to_quickly_see_how_much_of_your/cygpgr7

[SpaceK33z]

I think this is also a perfectly valid excuse to cleanup the code somewhat. Right now it loops through the media found on Plex, immediately searches the Netflix Roulette API and logs the output. It would be a lot cleaner to let ./index.js return an JSON array with the processed media, and let ./cli.js simply loop through the resulting JSON and log it to the console.