layout: add Elasticsearch Trace exporters. (#640)

Author: songy23

layouts/shortcodes/feature-matrix.html

@@ -54,6 +54,19 @@
 		<td data-label="ruby">–</td>
 	</tr>
 
+	<tr>
+		<td>Elasticsearch</td>
+		<td data-label="csharp">-</td>
+		<td data-label="cpp">–</td>
+		<td data-label="erlang">–</td>
+		<td data-label="golang">–</td>
+		<td data-label="java"><abbr title="Trace Exporter" class="trace-exporter blue white-text">T</abbr></td>
+		<td data-label="nodejs">–</td>
+		<td data-label="php">–</td>
+		<td data-label="python">–</td>
+		<td data-label="ruby">–</td>
+	</tr>
+
         <tr>
 	        <td>Honeycomb</td>
 	        <td data-label="csharp">–</td>