Feature #6071 : refactoring the UI management around confirmation of subscription notification.
(adding new web services around subscription)
(adding a new easy display of confirmation popup which the content comes from an AJAX call)
(adding a new Silverpeas JQuery Plugin in order to handle some subscription services)
(adding a new way to load javascript plugin dynamically)
(renaming a factory into provider)
(modifying JMS services to handle the feature)

Feature #6071 : refactoring subscription services in order to have the possibility from centralized services to get subscription data according to specific component rules.

Feature #6071 : adding centralized possibility to skip the subscription notification on small modifications of the content of a contribution.
Fixing a technical error on component instance creation.
Feature #6071 :
- taking into account Nicolas's feedback
- improving the general behavior of the HTLM editor Web Page
Fixing an unstable Javascript condition