Add example

README.md

@@ -2,3 +2,48 @@ JQuery Sumtr
 ============
 
 Allows you to summarize table rows with ease.
+
+Given the following markup:
+
+    <table id="myTable">
+      <thead>
+        <tr>
+          <th>Name</th>
+          <th>First</th>
+          <th>Second</th>
+          <th>Third</th>
+        </tr>
+      </thead>
+      <tbody>
+          <tr>
+            <td>Bob</td>
+            <td class="sum">1</td>
+            <td>A</td>
+            <td class="sum">3</td>
+          </tr>
+          <tr>
+            <td>Henry</td>
+            <td class="sum">5</td>
+            <td>B</td>
+            <td class="sum">9</td>
+          </tr>
+          <tr>
+            <td>Janet</td>
+            <td class="sum">1</td>
+            <td>C</td>
+            <td class="sum">3</td>
+          </tr>
+      </tbody>
+      <tfoot>
+          <tr class="summary">
+            <td>Total:</td>
+            <td></td>
+            <td></td>
+            <td></td>
+          </tr>
+      </tfoot>
+    </table>
+
+Just apply the plugin as follows
+
+    $('#myTable').sumtr();