Add dates to all releases in changes.rst

Updated docs/contributing.rst to date the release as part of the release
process.

Useful when scanning history for the evolution of the project over time.

Follows practices recommended by http://keepachangelog.com/

Author: jdufresne

docs/changes.rst

@@ -1,13 +1,13 @@
 Change log
 ==========
 
-UNRELEASED
-----------
+1.9.1 (2017-11-15)
+------------------
 
 * Fix erroneous ``ContentNotRenderedError`` raised by the redirects panel.
 
-1.9
----
+1.9 (2017-11-13)
+----------------
 
 This version is compatible with Django 2.0 and requires Django 1.8 or
 later.
@@ -18,8 +18,8 @@ Bugfixes
 * The profiling panel now escapes reported data resulting in valid HTML.
 * Many minor cleanups and bugfixes.
 
-1.8
----
+1.8 (2017-05-05)
+----------------
 
 This version is compatible with Django 1.11 and requires Django 1.8 or
 later.
@@ -56,8 +56,8 @@ Bugfixes
   forms rendering.
 * Long SQL statements are now forcibly wrapped to fit on the screen.
 
-1.7
----
+1.7 (2017-03-05)
+----------------
 
 Bugfixes
 ~~~~~~~~
@@ -72,8 +72,8 @@ Bugfixes
 * A few CSS classes have been prefixed with ``djdt-`` to avoid
   conflicting class names.
 
-1.6
----
+1.6 (2016-10-05)
+----------------
 
 The debug toolbar was adopted by jazzband.
 
@@ -91,8 +91,8 @@ Bugfixes
 * The ``DebugToolbarMiddleware`` now also supports Django 1.10's ``MIDDLEWARE``
   setting.
 
-1.5
----
+1.5 (2016-07-21)
+----------------
 
 This version is compatible with Django 1.10 and requires Django 1.8 or later.
 
@@ -107,8 +107,8 @@ Bugfixes
 * Improve the UI slightly.
 * Fix invalid (X)HTML.
 
-1.4
----
+1.4 (2015-10-06)
+----------------
 
 This version is compatible with Django 1.9 and requires Django 1.7 or later.
 
@@ -125,8 +125,8 @@ Bugfixes
 * Response time for requests of projects with numerous media files has
   been improved.
 
-1.3
----
+1.3 (2015-03-10)
+----------------
 
 This is the first version compatible with Django 1.8.
 
@@ -148,8 +148,8 @@ Bugfixes
 * The private copy of jQuery no longer registers as an AMD module on sites
   that load RequireJS.
 
-1.2
----
+1.2 (2014-04-25)
+----------------
 
 New features
 ~~~~~~~~~~~~
@@ -165,8 +165,8 @@ Bugfixes
   This private copy is available in ``djdt.jQuery``. Third-party panels are
   encouraged to use it because it should be as stable as the toolbar itself.
 
-1.1
----
+1.1 (2014-04-12)
+----------------
 
 This is the first version compatible with Django 1.7.
 
@@ -191,8 +191,8 @@ Deprecated features
 * The ``INTERCEPT_REDIRECTS`` setting is superseded by the more generic
   ``DISABLE_PANELS``.
 
-1.0
----
+1.0 (2013-12-21)
+----------------
 
 This is the first stable version of the Debug Toolbar!
 

docs/contributing.rst

@@ -121,7 +121,9 @@ their job, ``.po`` files must be downloaded with ``make update_translations``.
 
 The release itself requires the following steps:
 
-#. Bump version numbers in docs/conf.py, README.rst and setup.py and commit.
+#. Bump version numbers in ``docs/changes.rst``, ``docs/conf.py``,
+   ``README.rst`` and ``setup.py``. Add the release date to
+   ``docs/changes.rst``. Commit.
 
 #. Tag the new version.