Adding form-controls-vert-rl-005 and 3 support images
in writing-modes spec and for section 3.1

--HG--
rename : support/cat.png => css-writing-modes-3/support/cat.png
rename : support/swatch-blue.png => css-writing-modes-3/support/swatch-blue.png
rename : support/swatch-orange.png => css-writing-modes-3/support/swatch-orange.png