anchor.diff:  + Response 200 (application/json)
   
       + Body
  -    
  +
               {
                   "products": [
                       {
  
positive.code:                 "products": "/markets/5/products"
              }
          ]
              
  ### Register a new Supermarket [POST]
  
  Registers a new supermarket to make transactions on, with the base image and everything else to be used.
  
  Base64 images shortened, because apiary would complain otherwise.
  
  + Request (application/json)
  
          {
              "name": "Pão de Açucar",
              "image": "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEASABIAAD//gAMQXBwbGVN",
              "location": {
                  "lat": "37.7898",
                  "lon": "-122.3942"
              }
          }
  
  + Response 201 (application/json)
  
      + Headers
  
              Location: /markets/5
  
      + Body
  
              {
                  "id": 5,
                  "name": "Pão de Açucar",
                  "image": "../imgs/markets/bretas.png",
                  "products": "/markets/5/products"
              }
  
  ## Single Market [/markets/{market_id}]
  
  
negative.code:         {
              "id": 2
          }
  
  + Response 404 (application/json)
  
      + Body
  
              {
                  "error": "Empty cart"
              }
  