fixed undo/redo bugs

renamed rdraught-ui to rdraught-gtk

rdraught-gtk/src/main.rs

@@ -0,0 +1,7 @@
+use glib::ExitCode;
+use rdraught::draughts::DraughtsGame;
+
+fn main() -> ExitCode {
+    let game = DraughtsGame::default();
+    rdraught_gtk::run(game)
+}