diff --git a/.gitignore b/.gitignore
index 5f8ae64..f25647b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,3 +42,4 @@ Desktop.ini
 .ropeproject/
 htmlcov/
 tags
+_build/
diff --git a/docs/changelog.rst b/docs/changelog.rst
new file mode 100644
index 0000000..9826f7d
--- /dev/null
+++ b/docs/changelog.rst
@@ -0,0 +1,5 @@
+Changelog
+=========
+
+* :feature:`-` initial model code for os users
+* :feature:`-` initial model code for mail address and mailbox management
diff --git a/docs/conf.py b/docs/conf.py
index 72bbeb9..228b845 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# pymode:lint_ignore=E501
 #
 # gnuviechadmin documentation build configuration file, created by
 # sphinx-quickstart on Sun May 18, 2014.
@@ -12,7 +13,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys, os
+#import sys
+#import os
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -26,7 +28,11 @@ import sys, os
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
-extensions = []
+extensions = ['releases', 'sphinx.ext.autodoc', 'celery.contrib.sphinx']
+
+# configuration for releases extension
+releases_issue_uri = 'https://dev.gnuviech-server.de/gva/ticket/%s'
+releases_release_uri = 'https://dev.gnuviech-server.de/gva/milestone/%s'
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -171,21 +177,21 @@ htmlhelp_basename = 'gnuviechadmindoc'
 # -- Options for LaTeX output --------------------------------------------------
 
 latex_elements = {
-# The paper size ('letterpaper' or 'a4paper').
-#'papersize': 'letterpaper',
+    # The paper size ('letterpaper' or 'a4paper').
+    #'papersize': 'letterpaper',
 
-# The font size ('10pt', '11pt' or '12pt').
-#'pointsize': '10pt',
+    # The font size ('10pt', '11pt' or '12pt').
+    #'pointsize': '10pt',
 
-# Additional stuff for the LaTeX preamble.
-#'preamble': '',
+    # Additional stuff for the LaTeX preamble.
+    #'preamble': '',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [
-  ('index', 'gnuviechadmin.tex', u'gnuviechadmin Documentation',
-   u'Jan Dittberner', 'manual'),
+    ('index', 'gnuviechadmin.tex', u'gnuviechadmin Documentation',
+     u'Jan Dittberner', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -228,9 +234,9 @@ man_pages = [
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-  ('index', 'gnuviechadmin', u'gnuviechadmin Documentation',
-   u'Jan Dittberner', 'gnuviechadmin', 'Customer center for gnuviech servers.',
-   'Miscellaneous'),
+    ('index', 'gnuviechadmin', u'gnuviechadmin Documentation',
+     u'Jan Dittberner', 'gnuviechadmin', 'Customer center for gnuviech servers.',
+     'Miscellaneous'),
 ]
 
 # Documents to append as an appendix to all manuals.
diff --git a/docs/index.rst b/docs/index.rst
index 99ec616..425bea4 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -14,7 +14,7 @@ Contents:
    install
    deploy
    tests
-
+   changelog
 
 
 Indices and tables
diff --git a/requirements/local.txt b/requirements/local.txt
index 644abf3..a81214d 100644
--- a/requirements/local.txt
+++ b/requirements/local.txt
@@ -3,3 +3,4 @@
 coverage==3.7.1
 django-debug-toolbar==1.2.1
 Sphinx==1.2.2
+releases==0.6.1