[Doc] update docs to clear out version supporting

Author: vanadium23

README.rst

@@ -6,6 +6,9 @@ django-tinymce
 .. image:: https://img.shields.io/pypi/v/django-tinymce.svg
         :target: https://pypi.python.org/pypi/django-tinymce
 
+.. image:: https://img.shields.io/pypi/pyversions/django-tinymce.svg
+        :target: https://pypi.python.org/pypi/django-tinymce
+
 .. image:: https://img.shields.io/pypi/dm/django-tinymce.svg
         :target: https://pypi.python.org/pypi/django-tinymce
 
@@ -55,6 +58,12 @@ In your code:
 
 **django-tinymce** uses staticfiles so everything should work as expected, different use cases (like using widget instead of HTMLField) and other stuff is available in documentation.
 
+Releases
+===================
+
+Latest release is 2.3.0. It's support python 2.7, 3.4, 3.5 and Django >= 1.6.
+Previous releases can be found on github, but they are no longer maintained.
+
 Documentation
 =============