[install-guide] The guide is version independent

Remove watermark for pike. This allows to remove sphinxmark extension
usage, so remove it and pillow from test-requirements and update
contributor-guide for this.

Explain that guide handles Pike release now.

Change-Id: Ib1c71971b822cc0aa3e6531b2d5607714551d9db

doc/contributor-guide/source/docs-builds.rst

@@ -162,17 +162,6 @@ If you do not want to use Tox, install the below prerequisites locally:
 
    # pip install sphinx
    # pip install openstackdocstheme
-   # pip install sphinxmark
-
-.. note::
-
-   Sphinxmark uses the `Pillow module
-   <http://pillow.readthedocs.io/en/3.1.x/index.html>`_ for creating PNG files.
-   If you encounter ``C module is not installed`` errors when Sphinx loads the
-   sphinxmark extension, you may need to install some of the
-   `external libraries
-   <http://pillow.readthedocs.io/en/3.1.x/installation.html#external-libraries>`_
-   for Pillow.
 
 To get the ``.html`` output locally, switch to the directory containing a
 ``conf.py`` and run:

doc/install-guide/source/conf.py

@@ -38,7 +38,7 @@ import openstackdocstheme
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['sphinxmark', 'openstackdocstheme']
+extensions = ['openstackdocstheme']
 
 # Add any paths that contain templates here, relative to this directory.
 # templates_path = ['_templates']
@@ -306,9 +306,3 @@ pdf_documents = [
     ('index', u'InstallGuide', u'Install Guide',
      u'OpenStack contributors')
 ]
-
-# -- Options for sphinxmark -----------------------------------------------
-sphinxmark_enable = True
-sphinxmark_div = 'docs-body'
-sphinxmark_image = 'text'
-sphinxmark_text = 'Pike'

doc/install-guide/source/preface.rst

@@ -23,7 +23,7 @@ are included.
    Please see the
    `OpenStack Training Labs <https://docs.openstack.org/training_labs/>`_.
 
-This guide documents the OpenStack Ocata release.
+This guide documents the OpenStack Pike release.
 
 .. warning::
 

test-requirements.txt

@@ -15,7 +15,6 @@ doc8 # Apache-2.0
 requests>=2.14.2  # Apache-2.0
 requestsexceptions>=1.2.0 # Apache-2.0
 reno>=1.8.0,!=2.3.1 # Apache-2.0
-sphinxmark>=0.1.19 # Apache-2.0
 lxml>=2.3,!=3.7.0  # BSD
 PyYAML>=3.10.0  # MIT
 jsonschema>=2.6.0
@@ -24,4 +23,3 @@ jsonschema>=2.6.0
 # Babel 2.4.0 is broken, fixed in 2.4.1
 Babel>=2.3.4,!=2.4.0  # BSD
 
-Pillow>=2.4.0  # PIL License