Add photos & data file

Folks, (@jgwhite @boneskull @timruffles) This branch adds some photos from Creative Commons and a data.json file you can fetch to populate models in the app ... it looks like none of the examples thus far request a data file, and I know this is something we discussed as an improvement. Additionally, I have a possible not horrible design to tack onto this.

I didn't want to overstep someone already editing their area, so if a volunteer steps forward to implement the fetch for the JSON data file, I can tack on a design.