Create release notes for the 1.6.0 release. (#382)

* Create release notes for version 1.6.0.

* Update 1.6.0 release notes.

Author: pieths

docs/release-notes/release-1.6.0.md

@@ -0,0 +1,42 @@
+# [NimbusML](https://docs.microsoft.com/en-us/nimbusml/overview) 1.6.0
+
+## **New Features**
+
+- **Initial implementation of NGramExtractor.**
+
+    [PR#320](https://github.com/microsoft/NimbusML/pull/320)
+    Produces a bag of counts of n-grams (sequences of consecutive values of length 1-n)
+    in a given vector of keys. It does so by building a dictionary of n-grams and using
+    the id in the dictionary as the index in the bag.
+
+- **Update Manifest Generator.**
+
+    [PR#329](https://github.com/microsoft/NimbusML/pull/329)
+    Update the Manifest Generator project to work with the latest changes and incorporate
+    it in to the build process.
+
+## **Bug Fixes**
+
+None.
+
+## **Enhancements**
+
+- **Update To ML.Net Version 1.4.0.**
+
+    [PR#353](https://github.com/microsoft/NimbusML/pull/353)
+
+- **Update To Latest Version Of DataPrep.**
+
+    [PR#379](https://github.com/microsoft/NimbusML/pull/379)
+
+- **Update Tests To Execute In Parallel.**
+
+    [PR#331](https://github.com/microsoft/NimbusML/pull/331)
+
+## **Documentation and Samples**
+
+None. 
+
+## **Remarks**
+
+None.

release-next.md

@@ -2,28 +2,15 @@
 
 ## **New Features**
 
-- **Initial implementation of NGramExtractor.**
-
-    [PR#320](https://github.com/microsoft/NimbusML/pull/320)
-    Produces a bag of counts of n-grams (sequences of consecutive values of length 1-n)
-    in a given vector of keys. It does so by building a dictionary of n-grams and using
-    the id in the dictionary as the index in the bag.
-
-- **Update Manifest Generator.**
-
-    [PR#329](https://github.com/microsoft/NimbusML/pull/329)
-    Update the Manifest Generator project to work with the latest changes and incorporate
-    it in to the build process.
+None.
 
 ## **Bug Fixes**
 
 None.
 
 ## **Enhancements**
 
-- **Update Tests To Execute In Parallel.**
-
-    [PR#331](https://github.com/microsoft/NimbusML/pull/331)
+None.
 
 ## **Documentation and Samples**