Add a note to users about the state of Nose.

Author: jszakmeister

doc/index.rst

@@ -3,6 +3,15 @@
    contain the root `toctree` directive.
 
 
+Note to Users
+=============
+
+Nose has been in maintenance mode for the past several years and will likely
+cease without a new person/team to take over maintainership.  New projects
+should consider using `Nose2 <https://github.com/nose-devs/nose2>`_, `py.test
+<http://pytest.org/>`, or just plain unittest/unittest2.
+
+
 Installation and quick start
 ============================