doc(main): update documentation and flows

dist/devices/gateway/GatewaySubdevice.js

@@ -0,0 +1,40 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+const events = require("events");
+class GatewaySubdevice extends events.EventEmitter {
+    constructor(sid, model) {
+        super();
+        this.sid = sid;
+        this.model = model;
+    }
+    get batteryLevel() {
+        /*
+          When full, CR2032 batteries are between 3 and 3.4V
+          http://farnell.com/datasheets/1496885.pdf
+        */
+        return this.voltage ? Math.min(Math.round((this.voltage - 2200) / 10), 100) : -1;
+    }
+    handleMessage(msg) {
+        if (msg.data.voltage) {
+            this.voltage = msg.data.voltage;
+        }
+        this.message = msg;
+    }
+    static get acceptedModels() {
+        return [];
+    }
+    ;
+    toJSON() {
+        let json = {};
+        for (let prop of Object.keys(this)) {
+            json[prop] = this[prop];
+        }
+        delete json._events;
+        delete json._eventsCount;
+        delete json._maxListeners;
+        json.batteryLevel = this.batteryLevel;
+        json.internalModel = this.internalModel;
+        return json;
+    }
+}
+exports.GatewaySubdevice = GatewaySubdevice;