Add release notes for version 3.1.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

docs/releases/3.1.rst

@@ -0,0 +1,68 @@
+=============================
+Mayan EDMS v3.1 release notes
+=============================
+
+Released: XX, 2018
+
+What's new
+==========
+
+Removals
+--------
+- None
+
+Upgrading from a previous version
+---------------------------------
+
+
+Using PIP
+~~~~~~~~~
+
+Type in the console::
+
+    $ pip install mayan-edms==3.0.1
+
+the requirements will also be updated automatically.
+
+
+Using Git
+~~~~~~~~~
+
+If you installed Mayan EDMS by cloning the Git repository issue the commands::
+
+    $ git reset --hard HEAD
+    $ git pull
+
+otherwise download the compressed archived and uncompress it overriding the
+existing installation.
+
+Next upgrade/add the new requirements::
+
+    $ pip install --upgrade -r requirements.txt
+
+
+Common steps
+~~~~~~~~~~~~
+
+Migrate existing database schema with::
+
+    $ mayan-edms.py performupgrade
+
+Add new static media::
+
+    $ mayan-edms.py collectstatic --noinput
+
+The upgrade procedure is now complete.
+
+
+Backward incompatible changes
+=============================
+
+* None
+
+Bugs fixed or issues closed
+===========================
+
+* `GitLab issue #486 <https://gitlab.com/mayan-edms/mayan-edms/issues/486>`_ Docker Verison 3.0 not working
+
+.. _PyPI: https://pypi.python.org/pypi/mayan-edms/

docs/releases/index.rst

@@ -22,6 +22,7 @@ versions of the documentation contain the release notes for any later releases.
 .. toctree::
    :maxdepth: 1
 
+   3.1
    3.0.1
    3.0