Improve javascript example

[jpadilla]

Looking to improve a bit the readability on the javascript snippets to something like this. Thoughts?

var coreapi = window.coreapi;

// Initialize a client & load the schema document
var client = new coreapi.Client();
var url = 'http://petstore.swagger.io/v2/swagger.json';

client.get(url)
  .then(function(document) {
    // Interact with the API endpoint
    var action = ['pet', 'addPet'];
    var params = {
      category: ...,
      status: ...,
      name: ...,
      tags: ...,
      photoUrls: ...,
      id: ...
    };

    return client.action(document, action, params=params);
  })
  .then(function(result) {
    // Return value is in 'result'
    console.log(result);
  });

[lovelydinosaur]

Possibly yes, although we might break the initialisation out into only ever being in the top section, in which case something like the existing style will be what we want.

(We could also include a schema initialisation example where it's loaded locally, rather than fetching it from the URL)