Make cli async so running the graph works, add schema generation to readme

README.md

@@ -7,6 +7,12 @@ A super fast, simple base for building analytics applications.
 A basic CLI is available to run a graph and a subset of analytics workloads.
 In development environments, use `cargo run --bin cli -- -h` for more information.
 
+### Generating the JSON schema:
+
+`cargo run --bin cli -- generate-schema`
+
+The schema will be written to a schema.json file.
+
 ## General Notes
 
 Setting the number of threads in overhead allocation: set RAYON_NUM_THREADS environment