DOC: updated badges

Author: jreback

README.md

@@ -54,7 +54,15 @@
   <td>Conda</td>
   <td>
     <a href="http://pandas.pydata.org">
-    <img src="http://pubbadges.s3-website-us-east-1.amazonaws.com/pkgs-downloads-pandas.png" alt="conda downloads" />
+    <img src="http://pubbadges.s3-website-us-east-1.amazonaws.com/pkgs-downloads-pandas.png" alt="conda default downloads" />
+    </a>
+  </td>
+</tr>
+<tr>
+  <td>Conda-forge</td>
+  <td>
+    <a href="http://pandas.pydata.org">
+    <img src="https://anaconda.org/conda-forge/pandas/badges/downloads.svg" alt="conda-forge downloads" />
     </a>
   </td>
 </tr>