Added localStorage for orders

Added localStorage for most recent order and also all previous orders.
These orders are stored as JSON strings and therefore need to be passed
through JSON.parse( string ) to get the original JSON object
Revert "Added localStorage for orders"

This reverts commit 7071e2845c74ca7b8642c1fc121fdf67994167eb.
Added storage and restoring of previous orders

Added system to save previous orders (and most recent order) as string
in localStorage. Also added way to recreate order from an object.