app: update logo

- adds favicon
- adds other platform icons
- adds manifest

Author: meganindya

public/browserconfig.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+  <msapplication>
+    <tile>
+      <square70x70logo src="icons/ms-icon-70x70.png" />
+      <square150x150logo src="icons/ms-icon-150x150.png" />
+      <square310x310logo src="icons/ms-icon-310x310.png" />
+      <TileColor>#ffffff</TileColor>
+    </tile>
+  </msapplication>
+</browserconfig>