[DOCS] Added older release notice. (#740)

debadair · web-flow · commit 5b1d3c500912 · 2019-12-09T14:38:55.000-08:00
diff --git a/docs/en/getting-started/page_header.html b/docs/en/getting-started/page_header.html
@@ -0,0 +1,5 @@
+<p>
+  <strong>NOTE</strong>: You are looking at documentation for an older release. 
+  For the latest information, see the 
+  <a href="../current/index.html">current release documentation</a>. 
+</p>  
diff --git a/docs/en/install-upgrade/page_header.html b/docs/en/install-upgrade/page_header.html
@@ -0,0 +1,5 @@
+<p>
+  <strong>NOTE</strong>: You are looking at documentation for an older release. 
+  For the latest information, see the 
+  <a href="../current/index.html">current release documentation</a>. 
+</p>  
diff --git a/docs/en/stack/page_header.html b/docs/en/stack/page_header.html
@@ -0,0 +1,5 @@
+<p>
+  <strong>NOTE</strong>: You are looking at documentation for an older release. 
+  For the latest information, see the 
+  <a href="../current/index.html">current release documentation</a>. 
+</p>  
