Checking in changes prior to tagging of version 0.07.

Changelog diff is:

diff --git a/Changes b/Changes
index dffcc02..0019429 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,8 @@
 Revision history for Perl extension AnyEvent::Lingr

+0.07 2013-03-21T11:42:00+09:00
+     - fixed observe event error message was undef on http level error.
+
 0.06 2013-03-19T11:41:00+09:00
      - added one more missing prereq: URI