Update notes for v1.0.13

[p]Truck City v1.0.13 has just been released. This is the changelog:[/p]

• [p]Bugfix: one-way road placement and direction algorithm improved to prevent incorrectly placed tiles (thank you Nneu)[/p]
• [p]Improvement: truck routing efficiency improved[/p]
• [p]Improvement: minor UI improvements on tooltip texts for one-way roads[/p]
• [p]Improvement: minor updates to tutorial texts to clarify some directions[/p]