news: add news for v0.4.0

Author: Alexander Pavel

NEWS

@@ -1,3 +1,16 @@
+12-Jul-2017 CONFIG-TRANSPILER v0.4.0
+
+  Features
+
+    - Added support for vagrant-virtualbox provider
+    - Added 'network_config' section for flannel
+    - Added new etcd-v3.2 flags
+
+  Fixes
+
+    - Handle omitted versions for flannel correctly
+    - Fixed envvar name LOCKSMITHD_ENDPOINT
+
 04-May-2017 CONFIG-TRANSPILER v0.3.1
 
   Features