Update README, fix build badge, add demo readme

README.md

@@ -1,8 +1,9 @@
-[![Build Status](https://dev.azure.com/kopernikusauto/AVP/_apis/build/status/open-source/ecal-rs%20release?branchName=main)](https://dev.azure.com/kopernikusauto/AVP/_build/latest?definitionId=3&branchName=main)
 
 
-[![Build and Test](https://github.com/kopernikusauto/ecal-rs/actions/workflows/build.yml/badge.svg)](https://github.com/kopernikusauto/ecal-rs/actions/workflows/build.yml)
+# ecal-rs
 
+[![Build and Test](https://github.com/kopernikusauto/ecal-rs/actions/workflows/check.yml/badge.svg)](https://github.com/kopernikusauto/ecal-rs/actions/workflows/check.yml)
 
-# ecal-rs
-Rust bindings to the Continental eCAL API
+Rust bindings to the Continental eCAL API.
+
+A build environment is defined in the [devcontainer.json](.devcontainer/devcontainer.json) file, and can be loaded in VS Code (docs describing that process are [here](https://code.visualstudio.com/docs/devcontainers/containers)).

demo/README.md

@@ -0,0 +1,21 @@
+# Demo
+
+A simple demo in which two agents communicate with each other.
+
+To test it, run the demo twice (in two windows) at the same time:
+
+    # `ping` running in window 1:
+    $ RUST_LOG=info cargo run --release
+    [2023-04-04T09:32:48Z INFO  ecal] eCAL initiailized as 'kcal_ping'.
+    [2023-04-04T09:32:49Z INFO  ecal_ping_demo] Ping 1
+    [2023-04-04T09:32:49Z INFO  ecal_ping_demo] Pong 2
+    [2023-04-04T09:32:50Z INFO  ecal_ping_demo] Ping 2
+    [2023-04-04T09:32:50Z INFO  ecal_ping_demo] Pong 3
+
+    # `pong` running simultaneously in window 2:
+    $ RUST_LOG=info cargo run --release -- --pong
+    [2023-04-04T09:32:48Z INFO  ecal] eCAL initiailized as 'kcal_ping'.
+    [2023-04-04T09:32:48Z INFO  ecal_ping_demo] Ping 1
+    [2023-04-04T09:32:49Z INFO  ecal_ping_demo] Ping 1
+    [2023-04-04T09:32:49Z INFO  ecal_ping_demo] Ping 1
+    [2023-04-04T09:32:49Z INFO  ecal_ping_demo] Pong 2