Test feature branches on Travis and Appveyor

.travis.yml

@@ -1,4 +1,4 @@
-# Copyright 2016 Peter Dimov
+# Copyright 2016, 2017 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
@@ -16,6 +16,7 @@ branches:
   only:
     - master
     - develop
+    - /feature\/.*/
 
 env:
   matrix:

appveyor.yml

@@ -10,6 +10,7 @@ branches:
   only:
     - master
     - develop
+    - /feature\/.*/
 
 environment:
   matrix: