Recursively sets <code>property</code> to <code>value</code> of current
node and its children
@param {String} name Property to update
@param {Object} value New property value
function(name, value) {
			this[name] = value;
			_.each(this.children, function(child) {
				child.updateProperty(name, value);
			});
			
			return this;
		}