feature request: annotation and game state saving

[alexti]

One can watch battle replays for the whole game even with the current Version of Dom2. Just save your trn files (for example, by copying nation.trn into nation1.trn, nation2.trn etc each turn) and afterwards copying desired file back into nation.trn). This can be simply automated outside of Dom2. The real problem is how to select the battles to watch. By the end of the game you will have hundreds of battles, most of them being totally boring.