[Etoys] Text Color

Hello,

I uploaded a change set that allows you to change the TextMorph's text color and background color independently. The viewer and red-halo menu are supposed to do what they should do.

One thing is that the previous inconsistency around #color: is eliminated, but it may cause slight confusion. Now, you have to call #textColor: or #selectionColor: to change the color of text, instead of #color:. As far as I know, there aren't any visible problems, including loading old projects, but you may see some things show up wrong color.

-- Yoshiki