Feature request: game export/import

[TheKiviest]

It would be nice to have a log of moves for each game that can be imported and viewed.

Format might be something like this:

1. X2222 O2211
   ...

Optionally, there can be an additional symbol when a field or a game is won for better readability, for example:
X1123+ O2333!

Ideally, game review should be a separate mode with better navigation between the moves. My suggestions for the interface are:

• Only current position is shown in the console window.
• A blank string advances the game.
• "b" reverts the move.
• "e" exits review mode.

[N1ckn1ght]

rn I was thinking about making log in the same format as input for easy import & analysis, however it's possible to use two different annotations at the same time. Good idea.