updated logo + png favicons

Author: Jannik-Hm

_includes/head-custom.html

@@ -2,6 +2,11 @@
 
 <meta name="google-site-verification" content="QcqbkyN7JkilKDkP5YmwyorBYfAn2vxk3z2jOP3Xiak" />
 
-{% if site.favicon %}
-  <link rel="shortcut icon" type="image/x-icon" href="{{ '/favicon.ico' | relative_url }}">
-{% endif %}
+<link rel="icon" type="image/png" href="/assets/icons/favicon-16x16.png" sizes="16x16">
+<link rel="icon" type="image/png" href="/assets/icons/favicon-32x32.png" sizes="32x32">
+<link rel="icon" type="image/png" href="/assets/icons/favicon-48x48.png" sizes="48x48">
+<link rel="icon" type="image/png" href="/assets/icons/android-chrome-192x192.png" sizes="192x192">
+<link rel="icon" type="image/png" href="/assets/icons/android-chrome-512x512.png" sizes="512x512">
+
+<link rel="apple-touch-icon" href="/assets/icons/apple-touch-icon.png" sizes=”180x180”>
+<link rel="apple-touch-icon" href="/assets/icons/favicon-167x167.png" sizes=”167x167”>