Merge pull request #41 from tomrake/update-googlecharts

Update googlecharts

googlecharts

@@ -1 +1 @@
-Subproject commit e5fa09e2089253a5a6571eeff3c257e6369ca600
+Subproject commit 51e1efdbcbde52d85d19fa53e04d1d858c79cef1