Revert "revert version to 1.6.0, but stable this time."

theengineear · theengineear · commit 0595796e375b · 2015-01-23T10:45:24.000-05:00
This reverts commit fd3a906.
diff --git a/plotly/version.py b/plotly/version.py
@@ -1 +1 @@
-__version__ = '1.6.0'
+__version__ = '1.6.4'
