update readme

Author: chfw

README.rst

@@ -11,9 +11,6 @@ django-excel - Let you focus on data, instead of file formats
 .. image:: https://readthedocs.org/projects/django-excel/badge/?version=latest
     :target: http://django-excel.readthedocs.org/en/latest/
 
-.. image:: http://img.shields.io/gittip/chfw.svg
-    :target: https://gratipay.com/chfw/
-
 **django-excel** is based on `pyexcel <https://github.com/chfw/pyexcel>`_ and makes
 it easy to consume/produce information stored in excel files over HTTP protocol as
 well as on file system. This library can turn the excel data into Pythonic a list of
@@ -61,6 +58,7 @@ Known constraints
 
 Fonts, colors and charts are not supported. 
 
+
 Installation
 ============
 
@@ -129,3 +127,15 @@ Dependencies
 * Django
 * pyexcel >= 0.1.5
 * pyexcel-webio
+
+Tested Django Versions
+========================
+
+.. image:: https://img.shields.io/badge/django-1.9-green.svg
+    :target: http://travis-ci.org/chfw/django-excel
+
+.. image:: https://img.shields.io/badge/django-1.8.2-green.svg
+    :target: http://travis-ci.org/chfw/django-excel
+
+.. image:: https://img.shields.io/badge/django-1.7.8-green.svg
+    :target: http://travis-ci.org/chfw/django-excel