Add Privacy Notice to Docs

Author: haotianw465

.yardopts

@@ -1,4 +1,5 @@
 --title 'AWS X-Ray SDK for Ruby'
 --markup markdown
+--template-path doc-src/templates
 --no-progress
 - LICENSE

doc-src/templates/default/layout/html/footer.erb

@@ -0,0 +1,6 @@
+<div id="footer">
+  Generated on <%= Time.now.strftime("%c") %> by
+  <a href="http://yardoc.org" title="Yay! A Ruby Documentation Tool" target="_parent">yard</a>
+  <%= YARD::VERSION %> (ruby-<%= RUBY_VERSION %>).
+<script src="/SdkStatic/sdk-priv.js" async="true"></script>
+</div>

doc-src/templates/default/setup.rb

@@ -0,0 +1,3 @@
+def javascripts
+  (super + %w(js/tabs.js)).uniq
+end