Destroy() does not properly remove bindings

[amelhorn]

Found out with testing that .destory() does not properly remove binding. Example Code:
`window.autocomplete = new TeleportAutocomplete({
el: '#search-box',
maxItems: 5,
geoLocate: false
});

$('#search-by-keyword span').on('click', function() {
window.autocomplete.destroy();
}`
After clicking the span identified, you can type into the box, but on pressing 'enter' the keydown bind for TeleportAutocomplete will fire. This can be corrected by commenting out lines 58-59:

// Shorthands
//HTMLElement.prototype.on = HTMLElement.prototype.addEventListener;
//HTMLElement.prototype.off = HTMLElement.prototype.removeEventListener;

and converting all .on/.off calls to jQuery.on/.off.

This may only be a problem when autocomplete is used in combination with jQuery. I have not tested this without.