Doesn't work for form elements

[oskarrough]

Hi, as <form> elements have a length they can't be used as Wallop containers because of this:

if (selector.length > 0) {  
  throw new Error('Selector cannot be an array, Refer to Usage documentation: https://github.com/peduarte/wallop#javascript');
} else {
  this.$selector = selector;
}

Any thoughts how we could like to deal with it? Something like if (selector.tagName !== 'FORM' && selector.length > 0) { perhaps?

Great module by the way, works really well otherwise!