[WIP] stub net 

### Work in progress

It's been so long since I worked on this -- I'm no longer sure if this is the best approach to the situation.

Advantages: centralizes logic for stubbing geocoding
Disadvantages: It's a hand-rolled version of what VCR provides

*Edit:* Sampriti suggested using [ruby's inbuilt webrick](https://gist.github.com/Integralist/2862917).

*Edit:* Yaro suggested using [Puffing-Billy](https://github.com/oesmith/puffing-billy).