Added logo and favicons

Fixes #11

Author: EtienneBruines

_includes/head.html

@@ -7,3 +7,21 @@
 	<link rel="stylesheet" href="/css/main.css">
 	<link rel="stylesheet" href="/css/golang.css">
 
+	<link rel="apple-touch-icon" sizes="57x57" href="/img/favicons/apple-icon-57x57.png">
+	<link rel="apple-touch-icon" sizes="60x60" href="/img/favicons/apple-icon-60x60.png">
+	<link rel="apple-touch-icon" sizes="72x72" href="/img/favicons/apple-icon-72x72.png">
+	<link rel="apple-touch-icon" sizes="76x76" href="/img/favicons/apple-icon-76x76.png">
+	<link rel="apple-touch-icon" sizes="114x114" href="/img/favicons/apple-icon-114x114.png">
+	<link rel="apple-touch-icon" sizes="120x120" href="/img/favicons/apple-icon-120x120.png">
+	<link rel="apple-touch-icon" sizes="144x144" href="/img/favicons/apple-icon-144x144.png">
+	<link rel="apple-touch-icon" sizes="152x152" href="/img/favicons/apple-icon-152x152.png">
+	<link rel="apple-touch-icon" sizes="180x180" href="/img/favicons/apple-icon-180x180.png">
+	<link rel="icon" type="image/png" sizes="192x192"  href="/img/favicons/android-icon-192x192.png">
+	<link rel="icon" type="image/png" sizes="32x32" href="/img/favicons/favicon-32x32.png">
+	<link rel="icon" type="image/png" sizes="96x96" href="/img/favicons/favicon-96x96.png">
+	<link rel="icon" type="image/png" sizes="16x16" href="/img/favicons/favicon-16x16.png">
+	<link rel="manifest" href="/img/favicons/manifest.json">
+	<meta name="msapplication-TileColor" content="#ffffff">
+	<meta name="msapplication-TileImage" content="/ms-icon-144x144.png">
+	<meta name="theme-color" content="#ffffff">
+

_includes/header.html

@@ -1,4 +1,4 @@
 <header class="row column">
-    <h1><a href="/">Engo</a></h1>
+    <h1><a href="/"><img alt="engo Logo" src="/img/logo.png" id="logo">engo</a></h1>
     <hr>
 </header>

css/main.css

@@ -1,4 +1,5 @@
 body     { text-align: center }
 footer p { font-size: small; color: gray; }
 h1 a     { color: black }
-.row     { max-width: 35rem }
+.row     { max-width: 35rem }
+#logo    { height: 10rem; display: block; margin: 0 auto }

img/favicons/android-icon-144x144.png

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig><msapplication><tile><square70x70logo src="/ms-icon-70x70.png"/><square150x150logo src="/ms-icon-150x150.png"/><square310x310logo src="/ms-icon-310x310.png"/><TileColor>#ffffff</TileColor></tile></msapplication></browserconfig>

img/favicons/android-icon-192x192.png

@@ -0,0 +1,41 @@
+{
+ "name": "App",
+ "icons": [
+  {
+   "src": "\/android-icon-36x36.png",
+   "sizes": "36x36",
+   "type": "image\/png",
+   "density": "0.75"
+  },
+  {
+   "src": "\/android-icon-48x48.png",
+   "sizes": "48x48",
+   "type": "image\/png",
+   "density": "1.0"
+  },
+  {
+   "src": "\/android-icon-72x72.png",
+   "sizes": "72x72",
+   "type": "image\/png",
+   "density": "1.5"
+  },
+  {
+   "src": "\/android-icon-96x96.png",
+   "sizes": "96x96",
+   "type": "image\/png",
+   "density": "2.0"
+  },
+  {
+   "src": "\/android-icon-144x144.png",
+   "sizes": "144x144",
+   "type": "image\/png",
+   "density": "3.0"
+  },
+  {
+   "src": "\/android-icon-192x192.png",
+   "sizes": "192x192",
+   "type": "image\/png",
+   "density": "4.0"
+  }
+ ]
+}