Twitter emoji and open sans font now local

src/app/views/base.twig

@@ -13,7 +13,7 @@
     <title>Level2</title>
 
     <!-- Bootstrap core CSS -->
-    <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
+    <link href='/css/fonts.css' rel='stylesheet' type='text/css'>
     <link href="/bootstrap/css/bootstrap.min.css" rel="stylesheet">
     <link href="/css/level2.css" rel="stylesheet">
     <script src="/js/jquery.min.js"></script>
@@ -66,7 +66,7 @@
     <script src="/js/trianglify.min.js"></script>
     <script src="/js/level2.js"></script>
     <script src="/bootstrap/js/bootstrap.min.js"></script>
-    <script src="https://twemoji.maxcdn.com/twemoji.min.js"></script>
+    <script src="/js/twemoji.min.js"></script>
     <script>
       twemoji.parse(
         document.body,

src/web/css/fonts.css

@@ -0,0 +1,13 @@
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Open Sans'), local('OpenSans'), url(/css/fonts/OpenSans-Regular.ttf) format('ttf');
+}
+
+@font-face {
+  font-family: 'Open Sans';
+  font-style: normal;
+  font-weight: 700;
+  src: local('Open Sans Bold'), local('OpenSans-Bold'), url(/css/fonts/OpenSans-Bold.ttf) format('ttf');
+}