Added Excelsoft to sponsor section.

Author: akshay-varun

public/css/main.css

@@ -922,7 +922,7 @@ footer {
 }
 
 .diamond {
-    width: 60%;
+    width: 120%;
 }
 
 .platinum {

public/images/sponsors/2020/excelsoft.png

@@ -368,7 +368,16 @@
         </div>
         <br/>
         <div class="row sponsor-row">
-            <div class="col-sm-12 ">
+            <div class="col-md-6 col-sm-12 ">
+                <div class="sponsor-wrapper">
+                    <a href="https://www.excelsoftcorp.com/" target="_blank" rel="noopener">
+                        <img class="sponsor-img img-fluid mx-auto d-block diamond"
+                             src="/images/sponsors/2020/excelsoft.png"
+                             alt="Excelsoft"
+                             title="Excelsoft"/></a>
+                </div>
+            </div>
+            <div class="col-md-6 col-sm-12 ">
                 <div class="sponsor-wrapper">
                     <a href="https://devfolio.co/" target="_blank" rel="noopener">
                         <img class="sponsor-img img-fluid mx-auto d-block diamond"