I think the number of go to turns is wrong. It could be fixed by removing [this line](https://github.com/FreeCol/freecol/blob/master/src/net/sf/freecol/common/model/PathNode.java#L253). All tests are still working after the change except [one](https://github.com/FreeCol/freecol/blob/master/test/src/net/sf/freecol/common/model/TradeRouteTest.java#L60), but it's really clear why.
