Determines if an object has no keys, if an array has no items, or if a string === ''.
@param {...Object} o The object to operate on.
@returns {Boolean} True if the object is 'empty', false otherwise.
@function
function isEmpty () {
                    return libs.object.every(arguments, function (item) {
                        return libs.object.size(item) === 0 && item !== false && item !== '' && item !== true;
                    });
                }