Create Track Map

Finally, a stable release!

• Each dimension is now its own separate layer, and you can switch between them using the layer button on the top right of the screen. Check the README for more information on configuring this.
  
• Clicking on a portal icon now also automatically switches to the other dimension.
• Trains crossing portals are now shown properly as heading into the portal and emerging from the other portal, rather than jumping across the screen.

• Added config options for the map's initial viewport (coordinates and zoom level), and maximum and minimum zoom levels. Check the README for more information.

• Added an overlay to the map that displays the coordinates of the map center and the cursor:
  

• Allows CTM to be used in single-player worlds and LAN servers.
• Adds a config option to disable the server.

Fixes an issue where loading the map stylesheet returns an error.

• Map styling can now be configured! Check the README for more information.

• Configuration is now available! The file create-track-map.json is automatically written to if it isn't found at startup. You can configure the web server port (3876 by default), and the update interval (0.5 second by default). You can also reload config changes on-the-fly using /ctm reload.

• The web server now serves / correctly, no need to go to /index.html.