Component disappears if there is a comment on the first line.

[mikeabrahamsen]

Using the following HTML template will fail unexpectedly:

<!-- templates/meld/counter.html -->
<div>
    <button meld:click="subtract">-</button>
    <input type="text" meld:model="count" readonly></input>
    <button meld:click="add">+</button>
</div>

While removing the comment with the same code works:

<div>
    <button meld:click="subtract">-</button>
    <input type="text" meld:model="count" readonly></input>
    <button meld:click="add">+</button>
</div>

To ensure morphDOM picks up changes correctly, we need to ensure the template always has <div> as the first line and nothing else.