Added keyboard shortcuts for load/new/save game.

gamecontrols.go

@@ -229,6 +229,16 @@ func (c *GameControls) Handle(ctx ui.Context, event ui.Event) bool {
 			c.game.Debug = !c.game.Debug
 			ctx.Overlays().Toggle(fpsOverlayName)
 		}
+		if e.Modifiers == ui.KeyModifierControl {
+			switch e.Key {
+			case ui.KeyL:
+				c.askUserBeforeLoad(ctx)
+			case ui.KeyN:
+				c.askUserBeforeNew(ctx)
+			case ui.KeyS:
+				c.askUserBeforeSave(ctx)
+			}
+		}
 	}
 	return false
 }