Update mcrj7.csl (major changes)

New layout. New items. The mcrj7.csl is now (almost) fully compliant with the McGill French 7th ed.

http://lawjournal.mcgill.ca/citeguide.php?locale=fr is deleted because McGill LJ website changed. The new URL will be add when new website launch.

A complete doc for mcrj7.csl will be published on http://f-mb.github.io/cslegal after the pull merge.