More features in the HTTP server (#16)

* Added more features to HTTP server

* Added a title to the multi-camera view page.
* Support naming cameras through a simple mapping using a text file.
* Updated some logging messages to be more verbose (and match those in pair.ts).
* Confirmed the charging status and battery level values reported back by DevStatusAck.
* Log camera status (charging, battery, Wifi strength) when connected.

* More updates to HTTP server

* Deal with Web Audio autoplay policy by starting camera on mute and adding a button to toggle the audio stream.
* Add a favicon so the server tan can be easily spotted.

The favicon file is a 48x48 32bpp ICO file, gzipped.

* Update README.md

* Describe flags and enable camera audio by default.

* Update audio button based on state change

* Update description of discovery_ip in bin.ts

* Update session start message in http_server.ts

* Update README.md

Update flags and note about --discovery_ip.

session.ts

@@ -107,7 +107,7 @@ export const makeSession = (
   };
 
   session.eventEmitter.on("disconnect", () => {
-    console.log(`Disconnected from ${session.devName} - ${session.dst_ip}`);
+    console.log(`Disconnected from camera ${session.devName} at ${session.dst_ip}`);
     session.dst_ip = "0.0.0.0";
     session.connected = false;
     session.timers.forEach((x) => clearInterval(x));
@@ -115,7 +115,7 @@ export const makeSession = (
   });
 
   session.eventEmitter.on("login", () => {
-    console.log(`Logged in - ${session.devName}`);
+    console.log(`Logging in to camera ${session.devName}`);
     onLogin(session);
   });
   return session;