Added 160 and 640 dpi CSS
Added 160 and 640 dpi draft AS skins
added missing test
fix errors in draft files
fix 480 dpi bitmap source
Dummy 120 and 640 dpi skins. 120 is just a copy of the 240 skins and 640 a copy of the 320 skins.
fix 160/480 path names
fix 120 path names