Add What's New section

Author: Kevin D Smith

doc/source/index.rst

@@ -44,6 +44,7 @@ to the best of both worlds.
    :maxdepth: 3
 
    install
+   whatsnew
    getting-started
    workflows
    binary-vs-rest

doc/source/whatsnew.rst

@@ -0,0 +1,26 @@
+
+.. Copyright SAS Institute
+
+.. _whatsnew:
+
+**********
+What's New
+**********
+
+This document outlines features and improvements from each release.
+
+v1.1.0 (March 21, 2017)
+=======================
+
+- Add support for Python 3.6 (Linux extension)
+- Implement `sample` method on `CASTable`
+- Add sampling support to plotting methods
+- `cas.dataset.max_rows_fetched` increased to 10,000
+- Add `terminate` method to `CAS` object to end session and close connection
+- Implement `fillna`, `replace`, and `dropna` methods on `CASTable`
+- Add `apply_labels` method on `SASDataFrame` to set column labels as column names
+
+v1.0.0 (September 9, 2016)
+==========================
+
+- Initial Release