Demo 1

• Use SimpleSocketSharp as Websocket library.
• Support traffic signs.
• Fix bugs and improve performance.

The first release - 20210314 - v0.1-alpha

• New map builder
• Compartible with the lastest drive code at https://github.com/makerhanoi/hello-via.
  Note: This version has a problem in displaying car speed and steering angle. We will fix it in the next release.