Added missing basic_widgets js

IPython/html/static/notebook/js/widgets/basic_widgets.py

@@ -0,0 +1,12 b''
+define([
+    "notebook/js/widgets/bool",
+    "notebook/js/widgets/button",
+    "notebook/js/widgets/container",
+    "notebook/js/widgets/float",
+    "notebook/js/widgets/float_range",
+    "notebook/js/widgets/int",
+    "notebook/js/widgets/int_range",
+    "notebook/js/widgets/multicontainer",
+    "notebook/js/widgets/selection",
+    "notebook/js/widgets/string",
+]);
  No newline at end of file