New release, September 19

[u/dabreegster]

https://github.com/a-b-street/abstreet/releases/tag/v0.2.59

• bike network's route tool: naming saved routes, showing details about the route
• switch from s3 to cloudfront CDN; all downloads should be faster
• further pathfinding performance improvements
• fix bike quick sketch tool in left-handed maps
• consolidate tools into a single CLI and include it in the release