Always show column headers on result page

Fixes #579

Signed-off-by: Ryan O'Hara <oharar@email.chop.edu>
<code>this.$el.children().each(function() {</code> loops over all three HTMLTableSectionElements - thead, tbody, and tfoot - but the following block only resizes the tbody columns.

```javascript
this.children.each(function(body) {
    body.children.each(function(row){
        width = $(document).width() / row.children.length;
        row.children.each(function(cell){
            cell.$el.css('width', width);
            cell.$el.css('max-width', width);
        });
    });
});
```