Adding Blocks

Adding a blocks option to the option screen which render templates into local variables so to allow for a layout-esq functionality. I have added examples in example/layout.js for both the render and renderFile functions.

This functionality also moves over to express and here is an example route.

```
app.get('/', function(req, res) {
  	var opt = {
  		locals: {
  		       page_home:"page-home"
  		},
  		blocks: {
  			content:{
  				filename:"views/home.ejs", 
  				locals:{}
  			}
  		}
  	};
        res.render('layouts/single', opt);
  });
```