implement contact form

- implement contact_form.forms.ContactForm
- implement contact_form.views.ContactFormView and
  contact_form.views.ContactSuccessView
- add new URL patterns 'contact_form' and 'contact_success' in
  contact_form.urls
- add contact_form templates base.html, contact_form.html, contact_form.txt,
  contact_form_subject.txt and contact_success.html
- add german translation for new strings
- add contact_form to .coveragerc
- add generated code documentation for contact_form app
- add changelog entry

docs/changelog.rst

@@ -1,6 +1,7 @@
 Changelog
 =========
 
+* :feature:`-` add contact form
 * :feature:`-` add imprint as flatpage
 * :support:`-` mark active menu item as active via context_processor and
   corresponding template markup

docs/code.rst

@@ -36,6 +36,7 @@ Django app code
 .. toctree::
 
    code/gnuviechadmin
+   code/contact_form
    code/dashboard
    code/domains
    code/hostingpackages

docs/code/contact_form.rst

@@ -0,0 +1,24 @@
+:py:mod:`contact_form` app
+==========================
+
+.. automodule:: contact_form
+
+
+:py:mod:`forms <contact_form.forms>`
+------------------------------------
+
+.. automodule:: contact_form.forms
+   :members:
+
+
+:py:mod:`urls <contact_form.urls>`
+----------------------------------
+
+.. automodule:: contact_form.urls
+
+
+:py:mod:`views <contact_form.views>`
+------------------------------------
+
+.. automodule:: contact_form.views
+   :members: