0.3.1. Fixes

- Fixed large road station parking problems.
- Fixed problem with save/load vehicle while parking in a full station.
- Fixed parking in truck stop with more than 1 stop.
- Hopefully finally fixed commodity price-related bugs.
- Fixed Autosave.
- Fixed Wall save/load.
- Increased vehicle simulation speed.
- Increased train capacity and loading capacity.
- Decreased ship capacity and added smaller, Panamax-sized ships.
- Added road/rail maintenance cost.
- Fixed multi-unit locomotive setup.
- Fixed train stuck unloading with multi-unit passenger locomotives.
- Fixed rail track tangent scaling issue with rail bridges, causing some inaccurate movement.
- Fixed traffic lights.
- Fixed station radius changing after game load.
- Added camera pitch and zoom keybinds.
- Added landscape edit height limits.
- Snap to Road/Rail changed to Alt button, instead of automatic.
- Commodity window changed to only show commodities on current map.
- Available vehicles window now shows cargo.