Renaming + Bugfixes

The project now has an actual name!

Initially, I had the placeholder of "Chess AI" but now it has been renamed to "Knightmare Katharsis".

Naturally, a knight logo and typography of the name will soon follow.

As for bugfixes, I fixed a bug where while you were deciding what piece to promote to, it would use your opponent's time instead of yours and another bug which didn't revert the time after undoing a move.