Make using json data more convention based

[rsleggett]

Currently have to specify full path to view and json path is a little "magic"

Need to get closer to existing handle bars call.

[rsleggett]

Existing calls in handlebars look like:

{{>feature features.feature_text_centre_a}}

Here "feature" is the partial, features is the json file and "feature_text_centre_a" is the json path.

What I currently have is:

@Component.Render( viewName : "~/Views/Components/content-cards/content-cards.cshtml", 
                       componentPath : "content-cards.contentCards.blockA")

So it's not far off, but the viewName should just be "content-cards" in this case.