Grab a random image for the generated headline

[shannonwells]

• [x] integrate w/ flickr api gem
• [x] use it to select tagged image
• [ ] styling
• [ ] fine tuning image selection via keyword choices and maybe some fallbacks?

[shannonwells]

Going to tackle this one & probably fit the icon font choice in here too.

[shannonwells]

I'm abandoning this feature because neither Google nor Flickr are reliable enough for fetching relevant images. Selections include random irrelevant ads, things that are in questionable taste (I mean super offensive, sometimes by accident of the headline and sometimes not), and sometimes things that are just sad.