clone.orderbook: clone a orderbook object, potentially stripping all history
In marsanul/quantstrat: Quantitative Strategy Model Framework

creates a copy of a orderbook, stripping all history (orders etc)

1 2	clone.orderbook(orderbook.st, cloned.orderbook.st, strip.history = TRUE, src_envir = .strategy, target_envir = .strategy)

`orderbook.st`	string identifying the source orderbook
`cloned.orderbook.st`	string naming the target orderbook
`strip.history`	boolean, default TRUE, whether to remove all orderbook history, keeping only the structure (e.g. assets)
`src_envir`	environment to get the source orderbook from, default `.strategy`
`target_envir`	environment to put the cloned orderbook in, passed to `put.orderbook`