Feature 4559 Plugin de requête sur le Plan de classement

In the advanced search page, the user can select the values of the PdC's axis with which some contents to find are classified. The rendering of these values selector per axis were directly done in a JSP are were impossible to reuse in other contexts.
The goal of this feature is to implement the rendering of these selectors within a javascript plugin built on JQuery in a way it can be reused in others pages. Accordance to the behavior of the previous rendering mechanism, the plugin renders only the axis that are used in a content classification and for each of them the values actually used in the content classifications.