added the ability to send an object of parameters to a lazy load

Now you can call lazy loaded views with
`view "viewName" model_name="TestModel" fetch_params="{json.stringified_object}"`

Pretty straight-forward. most of this PR is adding tests to fetchLazy.
I would just make a function to simplify a little bit.

Then you can just do this.
```
expect(fetchSpec().model)...
```