DOCS-375 implement custom 404 page (and related pages)

layout.html modified to add logic to alter Google Analytics code
depending on whether it's an error page being generated or a normal
page.
The .htaccess file needs to be dropped in the root directory of
the manual (or appended to the one for the site).
Sphinx ignores the .htaccess file and does not copy it to the
built html directory.

Author: Ed Costello

source/.htaccess

@@ -0,0 +1,5 @@
+# Note: this must be manually copied, sphinx does not process it
+ErrorDocument 401 /manual/meta/401.html
+ErrorDocument 403 /manual/meta/403.html
+ErrorDocument 404 /manual/meta/404.html
+ErrorDocument 410 /manual/meta/410.html

source/meta/401.txt

@@ -0,0 +1,7 @@
+:orphan:
+
+=======================
+Authentication Required
+=======================
+
+You must log in to access the URL you requested.

source/meta/403.txt

@@ -0,0 +1,7 @@
+:orphan:
+
+=============
+Access Denied
+=============
+
+You do not have access to the URL you requested.

source/meta/404.txt

@@ -0,0 +1,7 @@
+:orphan:
+
+==============
+File not found
+==============
+
+The URL you requested does not exist or has been removed.

source/meta/410.txt

@@ -0,0 +1,7 @@
+:orphan:
+
+============
+File Deleted
+============
+
+The URL you requested has been deleted.

themes/mongodb/layout.html

@@ -222,21 +222,25 @@ <h3>{{ _('Navigation') }}</h3>
     </div>
 {%- endblock %}
 
-{%- block analytics%}
+{%- block analytics %}
 <script type="text/javascript">
-var _gaq = _gaq || [];
-_gaq.push(['_setAccount', 'UA-7301842-8']);
-_gaq.push(['_setDomainName', 'mongodb.org']);
-_gaq.push(['_trackPageview']);
-(function() {
-var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
-ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
-var s = document.getElementsByTagName('script')[0];
-s.parentNode.insertBefore(ga, s);
-})();
+	var _gaq = _gaq || [];
+	_gaq.push(['_setAccount', 'UA-7301842-8']);
+	_gaq.push(['_setDomainName', 'mongodb.org']);
+	{%- if (pagename == "meta/401") or (pagename == "meta/403") or (pagename == "meta/404") or (pagename == "meta/410") %}
+	_gaq.push(['_trackPageview', '/manual/{{pagename}}.html?page=' + document.location.pathname + document.location.search + '&from=' + document.referrer]);
+	{%- else %}
+	_gaq.push(['_trackPageview']);
+	{%- endif %}
+
+	(function() {
+		var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+		ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+		var s = document.getElementsByTagName('script')[0];
+		s.parentNode.insertBefore(ga, s);
+		})();
 </script>
 {%- endblock %}
-
 {%- block marketo %}
 <script type="text/javascript">
 document.write(unescape("%3Cscript src='" + document.location.protocol + "//munchkin.marketo.net/munchkin.js' type='text/javascript'%3E%3C/script%3E"));