add "\n" to log_line. ALFC coderef does not add "\n"
Checking in changes prior to tagging of version 0.21.

Changelog diff is:

diff --git a/Changes b/Changes
index 0ca8662..1bf8d98 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension Plack::Middleware::AxsLog

 {{$NEXT}}

+0.21 2014-02-20T06:14:17Z
+
+        - [BUGFIX] log_line that returns from ALFC coderef does not have "\n"
+
 0.20 2014-01-29T03:02:52Z

         - use POSIX::strftime::Compiler 0.30