Significant issue with copy in and copy out

[Garethlomax]

issue on 125+ in lstm main forward module - we may not be copying in data at all correctly. As well as the copy in issue, issue with constructor means that copy in copy out may not be being assigned properly

[Garethlomax]

changing copy out and copy in behaviour to new design. copy out and copy in are returned to boolean.

copy out is now just list of copied out tensors in [[h,c].[h,c]] format. Forward takes as arguments x, and the copied out tensor list.

the forward class iterates over the boolean tensor list and copies in any requires, or initialises those needed.