docs: add google tag (#331)

Update copyright for docs.

doc/_templates/layout.html

@@ -0,0 +1,19 @@
+{% extends "!layout.html" %}
+
+{%- block extrahead %}
+
+   {% if theme_googletag  %}
+   <!-- Google Tag Manager -->
+      <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-JQHP"
+                       height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+      <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push(
+        {'gtm.start': new Date().getTime(),event:'gtm.js'}
+      );var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+      })(window,document,'script','dataLayer','GTM-JQHP');</script>
+      <!-- End Google Tag Manager -->
+
+   {% endif %}
+{%- endblock -%}
+

doc/conf.py

@@ -9,6 +9,8 @@ sys.path[0:0] = [os.path.abspath('..')]
 
 import pymongo
 
+import datetime
+
 # -- General configuration -----------------------------------------------------
 
 # Add any Sphinx extension module names here, as strings. They can be extensions
@@ -28,7 +30,8 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'PyMongo'
-copyright = u'2008 - 2015, MongoDB, Inc.'
+copyright = u'MongoDB, Inc. 2008-{0}. MongoDB, Mongo, and the leaf logo are registered trademarks of MongoDB, Inc'.format(datetime.date.today().year)
+html_show_sphinx = False
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -82,7 +85,10 @@ db = client.doctest_test
 # Theme gratefully vendored from CPython source.
 html_theme = "pydoctheme"
 html_theme_path = ["."]
-html_theme_options = {'collapsiblesidebar': True}
+html_theme_options = {
+    'collapsiblesidebar': True,
+    'googletag': False
+}
 
 # Additional static files.
 html_static_path = ['static']

doc/pydoctheme/theme.conf

@@ -21,3 +21,4 @@ visitedlinkcolor = #00608f
 headtextcolor = #1a1a1a
 headbgcolor = white
 headlinkcolor = #aaaaaa
+googletag = False