translator enhancement

[Eric Dean Tribble <tribble>]

I added a feature so that you can say '[do something] smalltalkOnly'
and it will execute in Smalltalk, but translate to nothing.  This is
very useful for inserting Transcript show: type messages.

I also corrected the crippled while printer so that it doesn't have an
extra indent.  You'll find that your code currently gradually crawls
inward one tab for every crippled while loop.

dean