Add effluent output handling

dependencies/reactor_class.js

@@ -26,6 +26,10 @@ class Reactor_CSTR {
         this.OTR = input.payload;
     }
 
+    get getEffluent() {
+        return {topic: "Effluent", payload: {F: this.F, C_in:this.state}};
+    }
+
     // expect update with timestamp
     updateState(input) {
         let newTime = input.payload;