use native pg
Checking in changes prior to tagging of version 0.6.1.

Changelog diff is:

diff --git a/History.md b/History.md
index 3ed33ed..4c34766 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,7 @@
+0.6.1 / 2013-11-06
+==================
+  * Use native pg
+
 0.6.0 / 2013-10-28
 ==================
   * Support pg 9.3
allow array types in user-func