Exercise2

Here's an alternative approach, which doesn't require explicit typing on the `jsonResults`, nor does it require casting `jsonResult` to `NSDictionary`.

```
var jsonResults = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: nil) as [NSDictionary]
for jsonResult in jsonResults
{
    entries.append(TwitterEntry(entry:jsonResult));
}```