Display documents from a space without being an app in the Accordion macro

Actually the Document Accordion Macro allow listing documents from AWM application and documents of a given xclass.

In this task we need to :

• Add the possibility to the macro to list documents from a space even if it is not an AWM space and without filtering by an xwiki class.
• Add the possibility to select only top level documents from the space
• Add the possibility to ignore '.WebHome' documents