Release Ram after solving

[Barcode9]

Hi,

one very cool change that would allow some experimenting with having multiple different solves open and compare them, would be to release RAM after solving.

[b-inary]

In fact, RAM is essentially required if we want to keep all information about the strategy and EVs for all decision nodes. In this sense, we cannot release RAM after solving.
A possible workaround, for example, is to discard information about post-river nodes and recalculate them on the fly when we want to see them. This treatment reduces RAM usage, but may also slightly degrade the user experience.