TODO

Open Vend System Web Gateway TODO

Web Socket Server
	build proof of concept server (and test client)
	BUILD SERVER!
	
Gateway
	X DB schema
	X Test on Rommie
	DB stored procedures
	X product page (buyproduct.php)
		X link to paypal.  paypal testing account?
		X Reserve stock
		X Insert transaction - status pending
	Vend page (vendproduct.php)
		X Download transaction details from PayPal
		X Check transaction details
		X Transaction status - to vend
			X Update buyer
		X Vend button
			X Remove stock reservation
			X Change stock level
			X Transaction status - completed
			Log problems with stock update
	Interface to web socket
	** Machine can now vend (dependant on Web Socket Server)
	Admin Interface
		Login/sessions
		View machines/products
		Update stock level (QR Code?)
		Add product
		Add machine
		Generate machine QR codes