Checking in changes prior to tagging of version 0.17.

Changelog diff is:

diff --git a/Changes b/Changes
index 3558e51..e57496b 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,8 @@ Revision history for perl module Protocol::WebSocket

 {{$NEXT}}

+0.17 2014-04-09T08:12:01Z
+
  - perl 5.8 unpack fix (Graham Ollis)
  - doc and test fixes (Michal Špaček)