updated delete to remove items attached the the purchase order as well,
sending a Liferay.fire("deletedOrder") for PurchaseOrderContents portlet to take the poID and hide the table of items attached to it.
Also setup a Liferay.on("addOrder") handler when the purchase is completed. Please fire an "addOrder" event passing the json object with it.
Merge branch 'master' of https://github.com/kailashnagarkoti/JavatunesP-portlet