Changelog 08/08 — Simple Trains Steam update #907807

Hey y'all, A small patch mainly to improve the player experience. Biggest thing is the auto attach/buy capacity upgrade addition. Added auto buy/attach feature for station-capacity upgrades. Basically, if you're gonna lose the game, but have enough money to buy a capacity-upgrade, the game will automatically buy one for you. Likewise, if you're gonna lose the game, but there's an unused capacity upgrade laying around, the game will auto attach it (the game will try this first before it tries to auto buy). This makes the game a bit more relaxing since you now do not need to babysit your stations all the time. You can just sit back and watch how things progress. Lowered probability for having a 3 special spawn types map as Daily Challenge. Maps with 3 special spawn types are quite hard, it feels like having more 1 or 2 special spawn types maps is better. So I changed it. Changed arrow tuto...