code: function each(item, fn, thisArg) {
      var arr = toArray(item);
      return arr.forEach.call(arr, fn, thisArg);
  }
docs: Runs an Array.forEach after calling Luc.Array.toArray on the item.
  It is very useful for setting up flexible api's that can handle none one or many.
  
  Luc.Array.each(this.items, function(item) {
  this._addItem(item);
  });
  
  vs.
  
  if(Array.isArray(this.items)){
  this.items.forEach(function(item) {
  this._addItem(item);
  })
  }
  else if(this.items !== undefined) {
  this._addItem(this.items);
  }
  
  @param  {Object}   item
  @param  {Function} callback
  @param  {Object}   thisArg