Add release notes for 1.0.6

Author: redapple

docs/news.rst

@@ -3,6 +3,14 @@
 Release notes
 =============
 
+1.0.6 (2016-05-04)
+------------------
+
+- FIX: RetryMiddleware is now robust to non-standard HTTP status codes (:issue:`1857`)
+- FIX: Filestorage HTTP cache was checking wrong modified time (:issue:`1875`)
+- DOC: Support for Sphinx 1.4+ (:issue:`1893`)
+- DOC: Consistency in selectors examples (:issue:`1869`)
+
 1.0.5 (2016-02-04)
 ------------------