The placeholder images you use for captions are getting scaled up so they look very blurry for me. Might be better to get bigger images and have them scale down

The placeholder images you use for captions are getting scaled up so they look very blurry for me. Might be better to get bigger images and have them scale down? placehold.it also allows you to specify your own text there by passing in the `text` parameter. This library looks great!