pp implemented but leak memory
fix memory leak
remove use Carp
implement insert_after to PP and add test
add pp.t
several fixes for PP support
revert .gitignore
prepare to release
Checking in changes prior to tagging of version 0.02.

Changelog diff is:

diff --git a/Changes b/Changes
index 4b7fea5..f11e4f2 100644
--- a/Changes
+++ b/Changes
@@ -1,6 +1,6 @@
 Revision history for Perl extension NgxQueue

-0.03 2013-03-13T16:40:00+09:00
+0.02 2013-03-13T16:40:00+09:00
      - Added PP implementation (Songmu)

 0.01 2013-03-13T11:25:18+09:00