IE 8 JS errors
```
SCRIPT438: Object doesn't support property or method 'addEventListener' 
ratchet.js, line 29 character 3
```

I sort of worked around this but I don't like my way

``` js
  if (!window.addEventListener) {
    window.attachEvent('touchend', function (event) {
      var modal = getModal(event);
      if (modal) {
        if (modal && modal.classList.contains('modal')) modal.classList.toggle('active');
        event.preventDefault(); // prevents rewriting url (apps can still use hash values in url)
      }
    });
  } else {
    window.addEventListener('touchend', function (event) {
      var modal = getModal(event);
      if (modal) {
        if (modal && modal.classList.contains('modal')) modal.classList.toggle('active');
        event.preventDefault(); // prevents rewriting url (apps can still use hash values in url)
      }
    });
  }
```
