Added the ability to loop over objects using an & segment marker.

I added the ability to loop over keyed objects using an & to parse objects like the following:
```javascript
{ status: 'success',
  message: null,
  result: 
   { '1': 
      { book_id: 1,
        archive_code: 'db_balle_f09',
        author: 'Troupe, Thomas Kingsley',
        illustrator: 'Heyworth, Heather',
        title: 'If I Were a Ballerina',
        title_short: 'If I Were a Ballerina',
        avg_review: 2.7642 },
     '2': 
      { book_id: 2,
        archive_code: 'db_cowb_s10',
        author: 'Braun, Eric',
        illustrator: 'Reid, Mick',
        title: 'If I Were a Cowboy',
        title_short: 'If I Were a Cowboy',
        avg_review: 2.5965 },
     '3': 
      { book_id: 3,
        archive_code: 'db_ffigh_s10',
        author: 'Troupe, Thomas Kingsley',
        illustrator: 'Reid, Mick',
        title: 'If I Were a Firefighter',
        title_short: 'If I Were a Firefighter',
        avg_review: 2.6156 } } }
```
	        
Using an `expectJSON` and `expectJSONTypes` of the following syntax:

```javascript
.expectJSONTypes('result.&', {
	book_id: String,
	archive_code: String,
	author: String,
	illustrator: String,
	title: String,
	title_short: String,
	avg_review: Number
})
```