Refactor preferences into injected object instead of global.
Refactor preferences into injected object instead of global.

The following unrequired preferences are removed:

 - FORCE_BREP
 - STORE_UID
 - SERIALIZE
 - EXPORT_2D
 - FULL_PARAMETRIC
 - ADD-DEFAULT_SITE
 - ADD_DEFAULT_STOREY
 - ADD_DEFAULT_BUILDING

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master