Add Razorpay to Powered By page.

This closes #271.

index.md

@@ -263,6 +263,12 @@ layout: base
             <img src="{{ site.baseurl }}/img/poweredby/ovh-logo.png" width="175" alt="OVH" />
           </a></div>
           
+        </li>
+        <li>
+          <div><a href="{{ site.baseurl }}/poweredby.html">
+            <img src="{{ site.baseurl }}/img/poweredby/razorpay-logo.png" width="175" alt="Razorpay" />
+          </a></div>
+          
         </li>
         <li>
           <div><a href="{{ site.baseurl }}/poweredby.html">

poweredby.md

@@ -101,6 +101,10 @@ If you would you like to be included on this page, please reach out to the [Flin
     <img src="{{ site.baseurl }}/img/poweredby/ovh-logo.png" alt="OVH" /><br />
       OVH leverages Flink to develop streaming-oriented applications such as real-time Business Intelligence or alerting systems. <br><br><a href="https://www.ovh.com/fr/blog/handling-ovhs-alerts-with-apache-flink/" target='_blank'><small><span class="glyphicon glyphicon-new-window"></span></small> Read more about how OVH is using Flink</a>
   </div>
+  <div class="powered-by-tile col-md-3 col-sm-4 col-xs-6">
+    <img src="{{ site.baseurl }}/img/poweredby/razorpay-logo.png" alt="Razorpay" /><br />
+      Razorpay, one of India's largest payment gateways, built their in-house platform Mitra with Apache Flink to scale AI feature generation and model serving in real-time. <br><br><a href=" https://medium.com/razorpay-unfiltered/data-science-at-scale-using-apache-flink-982cb18848b" target='_blank'><small><span class="glyphicon glyphicon-new-window"></span></small> Read more about data science with Flink at Razorpay</a>
+  </div>
   <div class="powered-by-tile col-md-3 col-sm-4 col-xs-6">
     <img src="{{ site.baseurl }}/img/poweredby/researchgate-logo.png" alt="ResearchGate" /><br />
       ResearchGate, a social network for scientists, uses Flink for network analysis and near-duplicate detection. <br><br><a href="http://2016.flink-forward.org/kb_sessions/joining-infinity-windowless-stream-processing-with-flink/" target='_blank'><small><span class="glyphicon glyphicon-new-window"></span></small> See ResearchGate at Flink Forward 2016</a>