Move MEDIA_LIBRARY_PER_SITE to Mezzanine so it will be documented.
Move MEDIA_LIBRARY_PER_SITE to Mezzanine so it will be documented.

ryneeverett/filebrowser-safe,ryneeverett/filebrowser-safe,fawx/filebrowser-safe,ryneeverett/filebrowser-safe,fawx/filebrowser-safe,ryneeverett/filebrowser-safe,fawx/filebrowser-safe