enhance README with details about project

[chadxz]

The README needs more details about quite a few pieces of the project:

• [ ] how to setup a google app with api access to the google places web api. See the hackathon-starter project for inspiration on how to provide this info
• [ ] using the 'config' node module, and any other node modules that aren't obvious
• [ ] the ngrok URL that is available when in development environment
• [ ] installing node.js and npm
• [ ] the versions of node.js/io.js this project works with
• [ ] installing npm and bower packages

It may be better if some of these topics had wiki articles instead of just living in the README, so that should be done if it makes sense.

[chadxz]

For the Google places api key: You have to create a project on Google Developers Console and enable Google Places Web Services API access, then generate a public API access key. Afterwards, run the app with the key in your environment like this:

GOOGLE_PLACES_API_KEY=your_key npm start

[chadxz]

23 pretty much covers the important bits of this. Closing this ticket