use svg directly for favicon and PWA

www/index.html

@@ -10,6 +10,7 @@
 	<meta name="theme-color" media="(prefers-color-scheme: light)" content="white">
 	<meta name="theme-color" media="(prefers-color-scheme: dark)" content="#404040">
 	<link rel="manifest" href="./manifest.json">
+	<link rel="icon" href="./logo.svg" sizes="any" type="image/svg+xml">
 
 	<!--Register Service Worker-->
 	<script>

www/manifest.json

@@ -3,14 +3,8 @@
     "short_name": "ytbn-pwa",
     "icons": [
         {
-            "src": "./icon-256.png",
-            "sizes": "256x256",
-            "type": "image/png"
-        },
-        {
-            "src": "./icon-1024.png",
-            "sizes": "1024x1024",
-            "type": "image/png"
+            "src": "./logo.svg",
+            "sizes": "any"
         }
     ],
     "lang": "en-US",

www/sw.js

@@ -4,7 +4,7 @@ var filesToCache = [
     './index.html',
     './ytbn_graphing_software.js',
     './ytbn_graphing_software_bg.wasm',
-    "./favicon.ico"
+    "./logo.svg"
 ];
 
 /* Start the service worker and cache all of the app's content */