Sets an attribute on all views or gets the value of the attribute
on the first view

@example
c.prop('text', 'my text') // sets text to 'my text' on all
// collection views
c.prop('name') // gets name attribute on the first view

@param {string} name Name of the attribute
@param {object=} value Value to set
@returns {view.Collection|Object} Self or attribute value
function(name, value) {
        if (arguments.length > 1) {
            for (var i = this.length - 1; i >= 0; i--) {
                utils.prop(this[i], name, value);
            }
            return this;
        } else {
            return this[0] ? utils.prop(this[0], name) : "";
        }
    }