change css-page-3 image-fit tests to css-images-3 object-fit, update spec link for image-orientation move from css-page-3 to css-images-3
move tests from css-page to css-images

--HG--
rename : css-page-3/image-fit-001.xht => css-images-3/image-fit-001.xht
rename : css-page-3/image-fit-006.xht => css-images-3/image-fit-006.xht
rename : css-page-3/img-orient-012.xht => css-images-3/img-orient-012.xht