Prepare push to trunk. Now working on version 3.20.1.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18052019

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15385 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ChangeLog

+2013-06-28: Version 3.20.0
+
+        Migrated several tests from blink to V8 repository.
+
+        Allowed users of the V8 API to distinguish between unset and undefined
+        HiddenValues (issue 2746).
+
+        Deprecated old style callbacks in the V8 API.
+
+        Turned on parallel recompilation.
+
+        Performance and stability improvements on all platforms.
+
+
 2013-06-18: Version 3.19.18
 
 	Fixed read-only attribute of Function.length in strict mode.

src/version.cc

@@ -34,7 +34,7 @@
 // system so their names cannot be changed without changing the scripts.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     20
-#define BUILD_NUMBER      0
+#define BUILD_NUMBER      1
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)