Modified and approved multicol-nested-margin-001,
multicol-nested-margin-002, multicol-nested-margin-003,
multicol-nested-margin-004, multicol-nested-margin-005.

Added multicol-nested-column-rule-001.xht

--HG--
rename : contributors/opera/submitted/multicol/multicol-nested-margin-ref.xht => contributors/opera/submitted/multicol/multicol-nested-margin-001-ref.xht
rename : contributors/opera/submitted/multicol/multicol-nested-margin-2-ref.xht => contributors/opera/submitted/multicol/multicol-nested-margin-002-ref.xht
rename : contributors/opera/submitted/multicol/multicol-nested-margin-3-ref.xht => contributors/opera/submitted/multicol/multicol-nested-margin-003-ref.xht