Update 2 - Secondary station bug fixes

Hi all, thanks for playing our game and your continued support. Our second update. While we fixed a bunch of train stopping issues with the first update, a couple of you were still having issues.. after some hunting, we think we found the cause: A cumulative error that broke the game after a high number of frames.. about 4 hours for us mere mortals, but at higher framerates, maybe as little as an hour of play. If you paused to do something else and came back, or you had a powerful rig, then that could cause this bug. This update fixes this, and adds some debug tools for us to catch any straggling issues. As mentioned in the forums, the station stops are something of a code bottleneck, meaning the same symptom was caused by a couple of bugs... we're hoping this was the last of them. As ever, we're in the forums keeping an eye, let us know if you run into trouble. And thanks for the steam reviews since the last update, they really do help. Things seem to be going well, and that's largely down to the amount folks are sharing and supporting the game. Cheers, Mike