Jupyter improvements

This fixes number of Jupyter bugs.

Tests passing here: 

https://nexedi.erp5.net/test_result_module/20161117-147BEEA9

/reviewed-on !198

bt5/erp5_data_notebook/ExtensionTemplateItem/portal_components/extension.erp5.JupyterCompile.xml

@@ -46,14 +46,13 @@
             <key> <string>text_content_warning_message</string> </key>
             <value>
               <tuple>
-                <string>W: 85,  2: Redefining name \'traceback\' from outer scope (line 9) (redefined-outer-name)</string>
-                <string>W:197,  8: Use of exec (exec-used)</string>
-                <string>W:252,  8: Use of exec (exec-used)</string>
-                <string>W:264,  8: Use of exec (exec-used)</string>
-                <string>W:327, 10: Unused variable \'mime_type\' (unused-variable)</string>
-                <string>W:462,  2: Redefining name \'IFrame\' from outer scope (line 17) (redefined-outer-name)</string>
-                <string>W:  9,  0: Unused import traceback (unused-import)</string>
-                <string>W: 13,  0: Unused import transaction (unused-import)</string>
+                <string>W:302, 10: Use of exec (exec-used)</string>
+                <string>W:348, 10: Use of exec (exec-used)</string>
+                <string>W:360, 10: Use of exec (exec-used)</string>
+                <string>W:444,  6: No exception type(s) specified (bare-except)</string>
+                <string>W:697,  6: Use of exec (exec-used)</string>
+                <string>W:923,  2: Redefining name \'IFrame\' from outer scope (line 4) (redefined-outer-name)</string>
+                <string>W: 18,  0: Unused log imported from Products.ERP5Type.Log (unused-import)</string>
               </tuple>
             </value>
         </item>

bt5/erp5_data_notebook/bt/description

-Interaction between Jupyter(IPython Notebook) and ERP5.
+Interaction between Jupyter (former IPython Notebook) and ERP5.
 
 !WARNING!
 This business template is unsafe to install on a public server as one of the extensions uses eval and allows remote code execution. Proper security should be taken into account. 
-This template includes a highly exprimental integration with PivotTableJs which doesn't follow ERP5 Javascript standards and will be refactored to use JIO and RenderJS.
+This template includes a highly experimental integration with PivotTableJs which doesn't follow ERP5 JavaScript standards and will be re factored to use jIO and RenderJS.
 !WARNING!
\ No newline at end of file