add color9, image9, image.Image loading, example view command. fonts don't quite work yet.

--HG--
rename : pix.go => color9/pix.go
add gopaint command
fix up buffer size for reading ctl, touch ups
fix missing variable, go fmt
fix up types for color9
add Image.Set to implement image/draw.Image
fix unused import
add stringwidth, replclipr, first go at Enter
rename Consctl from Keyboardctl, implement /dev/kbd in Keyboardctl
fix cmds, go fmt
add Cursor type and SetCursor
add snarf functions