Add Mynewt 1.6.0 and NimBLE 1.1.0 release

This also updates download page to container direct links to PGP and SHA512
as required by Apache standards.
diff --git a/custom-theme/main-banner.html b/custom-theme/main-banner.html
index 8da250c..1f31525 100644
--- a/custom-theme/main-banner.html
+++ b/custom-theme/main-banner.html
@@ -8,7 +8,7 @@
         </div>
         <div class="news-cell">
             <div class="well">
-                <h4>Latest News:</h4> <a href="/download">Apache Mynewt 1.5.0 </a> released (Nov 5, 2018)
+                <h4>Latest News:</h4> <a href="/download">Apache Mynewt 1.6.0, Apache NimBLE 1.1.0 </a> released (April 9, 2019)
             </div>
         </div>
     </div>
diff --git a/docs/download.md b/docs/download.md
index 7ce0e54..8613861 100644
--- a/docs/download.md
+++ b/docs/download.md
@@ -2,19 +2,27 @@
 
 ### Latest Apache Mynewt Core OS Release
 
-*   Release Version: Apache Mynewt 1.5.0
-*   Release Date: Nov 5, 2018
-*   [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.5.0)
-*   [Release Download](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.5.0)
+*   Release Version: Apache Mynewt 1.6.0
+*   Release Date: April 9, 2019
+*   [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.6.0)
+*   [Release Download](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.6.0/)
+ *  [core](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.6.0/apache-mynewt-core-1.6.0.tgz)
+    [[PGP]](https://www.apache.org/dist/mynewt/apache-mynewt-1.6.0/apache-mynewt-core-1.6.0.tgz.asc)
+    [[SHA512]](https://www.apache.org/dist/mynewt/apache-mynewt-1.6.0/apache-mynewt-newt-1.6.0.tgz.sha512)
+ *   [newt](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.6.0/apache-mynewt-newt-1.6.0.tgz)
+    [[PGP]](https://www.apache.org/dist/mynewt/apache-mynewt-1.6.0/apache-mynewt-newt-1.6.0.tgz.asc)
+    [[SHA512]](https://www.apache.org/dist/mynewt/apache-mynewt-1.6.0/apache-mynewt-newt-1.6.0.tgz.sha512)
 
 ### Latest Apache Mynewt NimBLE (Bluetooth Stack) Release
 
 Mynewt's Bluetooth stack is now a separate release with a porting layer that allows it to be easily ported to another OS!
 
-*   Release Version: Apache NimBLE 1.0.0
-*   Release Date: June 13, 2018
-*   [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.4.0)
-*   [Release Download](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.4.0)
+*   Release Version: Apache NimBLE 1.1.0
+*   Release Date: April 9, 2019
+*   [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-NimBLE-1.1.0)
+*   [Release Download](http://www.apache.org/dyn/closer.lua/mynewt/apache-nimble-1.1.0/apache-mynewt-nimble-1.1.0.tgz)
+    [[PGP]](https://www.apache.org/dist/mynewt/apache-nimble-1.1.0/apache-mynewt-nimble-1.1.0.tgz.asc)
+    [[SHA512]](https://www.apache.org/dist/mynewt/apache-nimble-1.1.0/apache-mynewt-nimble-1.1.0.tgz.sha512)
 
 #### Fresh install
 
@@ -67,10 +75,11 @@
 *   Apache Mynewt 1.3.0 [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.3.0), [Release Archive](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.3.0)
 *   Apache Mynewt 1.4.0 [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.4.0), [Release Archive](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.4.0)
 *   Apache Mynewt 1.4.1 [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.4.1), [Release Archive](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.4.1)
+*   Apache Mynewt 1.5.0 [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.5.0), [Release Archive](http://www.apache.org/dyn/closer.lua/mynewt/apache-mynewt-1.5.0)
 
 #### Apache Mynewt NimBLE (Bluetooth Stack)
 
-No archives yet
+*   Apache NimBLE 1.0.0 [Release Notes](https://cwiki.apache.org/confluence/display/MYNEWT/RN-1.4.0), [Release Archive](http://www.apache.org/dyn/closer.lua/mynewt/apache-nimble-1.0.0)
 
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