Update Nullify/examples/Background_Links.txt

Author: tcorral

Nullify/examples/Background_Links.txt

@@ -1,4 +1,5 @@
 http://javascript.crockford.com/memory/leak.html
 http://geekswithblogs.net/FrostRed/archive/2008/11/29/127440.aspx
 http://www.ibm.com/developerworks/web/library/wa-memleak/
-http://msdn.microsoft.com/en-us/library/Bb250448
+http://msdn.microsoft.com/en-us/library/Bb250448
+http://buildnewgames.com/garbage-collector-friendly-code/