[FEATURE] Ember.View's defaultTemplate to support precompiled templates

Right now, `defaultTemplate` forces us from being able to precompile all of our templates.  This PR optionally adds the ability to reference the template name by string and resolves using `templateForName`

I'm open to suggestions, such as keeping with convention and adding something like `defaultTemplateName`.  

I also will add tests if there is interest in this feature.
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