Merge branch 'feature/machine-raw-data' into 'master'

Feature/machine raw data

Closes #4

See merge request fabinfra/fabaccess/fabaccess-api!5

api.capnp

@@ -123,6 +123,9 @@ struct Machine {
         
         setProperty @3 (property :PropertyMap.Property) -> ();
         # Write ONE Machine Property identified by it's key
+
+        sendRawData @4 (data :Data) -> ();
+        # send a blob of arbitrary data to the machine
     }