Switch to jupyter python distribution
ipython notebook is obsolete, replace it by jupyter.
This merge request consist of:
- adding jupyter component providing base jupyter software
 - replacing inpython_notebook SR with jupyter one
 - adapting ERP5 and Wendelin SR to use jupyter
 - renaming ipython into jupyter respectively
 
TODOs:
- 
begin able to run ERP5Kernel  - 
assure that paths are correctly used and configured ( http://jupyter.readthedocs.io/en/latest/projects/jupyter-directories.html )  - 
being able to run python2 standard kernel  - 
as notebook_diris not moved, no migration or manual steps are required for instances running older versions of Jupyter integration; nevertheless before merging this code checks shall be executed to assert no impact on data - 
have custom.[js|css]information available for ERP5Kernel - 
add folder for extensions !190 (comment 37030)  - 
review by notebook users usability of new apporach ( ping Klaus & Tyagov when done)  - 
use scriptsfromzc.recipe.eggfor explicity and control - 
split some commits to small functional ones  - 
await for tests with Jupyter instantiation: ERP5-MASTER-slapos!190, status: Completed, FAILm the results are the same as ERP5-MASTER - also FAIL with 74 count