Layout Manager V2 DONE. V1 files and functions has been kept (to delete later)
Clean of the old method OwnController::render(). Deletion of the old Layout manager class.
LayoutManager class fully documented
LayoutManager/OwnController : return html and displays it by an 'echo' in the index (at the end of the whole process)
Before the 'echo' was done in the OwnController class.
LayoutManager : Some comments added
Some little changes before the update of the relation manager (managing relation updates)