Version 3.13.1

Performance and stability improvements on all platforms.

git-svn-id: http://v8.googlecode.com/svn/trunk@12323 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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+2012-08-16: Version 3.13.1
+
+        Performance and stability improvements on all platforms.
+
+
 2012-08-10: Version 3.13.0
 
         Added histograms for total allocated/live heap size, as well as