v1.0.2. Add Game Viewer Keybindings, Update Flattener

This is a minor release.

For the Game Viewer, the following keybindings were added.

[ ]  => toggle selected variations
, .  => go to the previous / next move
< >  => jump behind / jump ahead

Also, the flattener code has continued to be improved, in preparation for gpub and the UI rewrite.

Lastly, excessive logging when opening the game-info-window has been fixed.