Use alabaster theme (googleapis#3496)

docs/_static/custom.css

@@ -0,0 +1,16 @@
+@import url('https://fonts.googleapis.com/css?family=Roboto|Roboto+Mono');
+
+@media screen and (min-width: 1080px) {
+    div.document {
+        width: 1040px;
+    }
+}
+
+code.descname {
+    color: #4885ed;
+}
+
+th.field-name {
+    min-width: 100px;
+    color: #3cba54;
+}

docs/conf.py

@@ -23,21 +23,14 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-from email import message_from_string
+import email
 import os
-from pkg_resources import get_distribution
-import sys
-import urllib
-
-import sphinx_rtd_theme
-
-
-ON_READ_THE_DOCS = os.environ.get('READTHEDOCS', None) == 'True'
+import pkg_resources
 
 # 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
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-sys.path.insert(0, os.path.abspath('..'))
+# sys.path.insert(0, os.path.abspath('..'))
 
 # -- General configuration -----------------------------------------------------
 
@@ -77,7 +70,7 @@
 # built documents.
 #
 # The short X.Y version.
-distro = get_distribution('google-cloud')
+distro = pkg_resources.get_distribution('google-cloud')
 release = os.getenv('SPHINX_RELEASE', distro.version)
 
 # The language for content autogenerated by Sphinx. Refer to documentation
@@ -119,15 +112,21 @@
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-
-if not ON_READ_THE_DOCS:
-    html_theme = 'sphinx_rtd_theme'
-    html_theme_path = [sphinx_rtd_theme.get_html_theme_path()]
+html_theme = 'alabaster'
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
 # documentation.
-#html_theme_options = {}
+html_theme_options = {
+    'description': 'Google Cloud Client Libraries for Python',
+    'github_user': 'GoogleCloudPlatform',
+    'github_repo': 'google-cloud-python',
+    'github_banner': True,
+    'travis_button': True,
+    'font_family': "'Roboto', Georgia, sans",
+    'head_font_family': "'Roboto', Georgia, serif",
+    'code_font_family': "'Roboto Mono', 'Consolas', monospace",
+}
 
 # Add any paths that contain custom themes here, relative to this directory.
 #html_theme_path = []
@@ -164,7 +163,14 @@
 #html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
-#html_sidebars = {}
+html_sidebars = {
+    '**': [
+        'about.html',
+        'navigation.html',
+        'relations.html',
+        'searchbox.html',
+    ]
+}
 
 # Additional templates that should be rendered to pages, maps page names to
 # template names.
@@ -216,7 +222,7 @@
 }
 
 metadata = distro.get_metadata(distro.PKG_INFO)
-author = message_from_string(metadata).get('Author')
+author = email.message_from_string(metadata).get('Author')
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual]).
 latex_documents = [