add support for CSS3 Writing Modes

after/syntax/css/css3-writing-modes.vim

@@ -0,0 +1,7 @@
+" TODO: create cssWritingModeProp group and cssWritingModeAttr group
+syn match cssFontProp contained "\<writing-mode\>"
+syn match cssFontProp contained "\<text-\(orientation\|combine\)\>"
+syn keyword cssFontAttr contained isolate plaintext upright 
+syn match cssFontAttr contained "\<horizontal-tb\>"
+syn match cssFontAttr contained "\<vertical-\(rl\|lr\|right\)\>"
+syn match cssFontAttr contained "\<rotate-\(right\|left\|normal\)\>"