Version 2 API only.

`fire`

Method Signature	void ultraCart.fire(String event);
Description	Fires an ultraCart event. This is useful if you update something in the cart manually and wish to notify renderers to update.
Parameter	String event - the name of the event. Events are listed and discussed in the init() method documentation.
Result	no return value

see addListener and removeListener

function setSomeFlag(){
    // assume that this variable means something to your renderers
    var someFlag = '50% off';
    ultraCart.fire(ultraCart.events.EVENT_CART_CHANGE);

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