Checking in changes prior to tagging of version 0.5.0.

Changelog diff is:

diff --git a/History.md b/History.md
index b7002d5..b8edb69 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+0.5.0 / 2013-06-22
+==================
+  * Update to use node-pg 2.0
+  * Properly handle json return type, no more manual parse required
+
 0.4.4 / 2013-06-21
 ==================
   * Fix -f with injected code that uses LiveScript primtives like $import