Checking in changes prior to tagging of version 0.29.

Changelog diff is:

diff --git a/Changes b/Changes
index 1e328ef..c2e235d 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Plack-App-Proxy

+0.29    08/31/2013
+        - Better cookie support with the AnyEvent::HTTP backend (Manni Heumann)
+
 0.28    08/24/2013
         - allow passing options to backend (clkao)