Restore plotlywidget/__init__.py

Author: jonmmease

packages/python/plotly/plotlywidget/__init__.py

@@ -0,0 +1,9 @@
+def _jupyter_nbextension_paths():
+    return [{
+        'section': 'notebook',
+        'src': 'static',
+        'dest': 'plotlywidget',
+        'require': 'plotlywidget/extension'
+    }]
+
+__frontend_version__ = '^0.1'