Add Yandex Metrika (#286)

src/index.pug

@@ -14,3 +14,17 @@ body
         function gtag(){dataLayer.push(arguments);}
         gtag('js', new Date());
         gtag('config', 'UA-131422254-1');
+    // Yandex.Metrika counter
+    script(type='text/javascript').
+        (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
+        m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
+        (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
+        ym(69481282, "init", {
+            clickmap:true,
+            trackLinks:true,
+            accurateTrackBounce:true
+        });
+    noscript
+        div
+            img(src='https://mc.yandex.ru/watch/69481282' style='position:absolute; left:-9999px;' alt='')
+    // /Yandex.Metrika counter