Moved a bunch of table border-collapse: separate
related tests into the more appropriated
css21/tables folder; the reference files
and support files and linkage have been
copied and/or moved and/or updated
accordingly.

--HG--
rename : css21/separated-border-model-003a.xht => css21/tables/separated-border-model-003a.xht
rename : css21/reference/separated-border-model-003b-ref.xht => css21/tables/separated-border-model-003b-ref.xht
rename : css21/separated-border-model-003b.xht => css21/tables/separated-border-model-003b.xht
rename : css21/separated-border-model-004a.xht => css21/tables/separated-border-model-004a.xht
rename : css21/separated-border-model-004b.xht => css21/tables/separated-border-model-004b.xht
rename : css21/separated-border-model-004c.xht => css21/tables/separated-border-model-004c.xht
rename : css21/reference/separated-border-model-004d-ref.xht => css21/tables/separated-border-model-004d-ref.xht
rename : css21/separated-border-model-004d.xht => css21/tables/separated-border-model-004d.xht
rename : css21/reference/separated-border-model-004e-ref.xht => css21/tables/separated-border-model-004e-ref.xht
rename : css21/separated-border-model-004e.xht => css21/tables/separated-border-model-004e.xht
rename : css21/reference/separated-border-model-007-ref.xht => css21/tables/separated-border-model-007-ref.xht
rename : css21/separated-border-model-007.xht => css21/tables/separated-border-model-007.xht
rename : css21/separated-border-model-008.xht => css21/tables/separated-border-model-008.xht
rename : css21/separated-border-model-009.xht => css21/tables/separated-border-model-009.xht