Some bugs and notes about TkSTEP

- It works in monochrome displays but some things will not be visible
because of it's colors. I'll not fix this in the near future, unless
somebody need it.
- Pixmaps of widgets have a fixed size
- Sometimes, widget behavior with attributes (color, width...) other 
than the default will not be as the user expects
- Radiobuttons will look terrible if you use X with a res. < 640x480
- Separators for menus will take no effect now.

