revisit role=presentation

In

Lines 6 to 9 in d468b06

    
           if (!node.hasAttribute('data-semantic-speech')) { 
        
             node.setAttribute('role', 'presentation'); 
        
             return; 
        
           }

we set everything "junk" to presentation.

Is this still necessary?

I guess we could try to sort out generic and presentational elements. Is it worth the effort?

	if (!node.hasAttribute('data-semantic-speech')) {
	node.setAttribute('role', 'presentation');
	return;
	}