print should be cleverer

[kjx]

we need to spec print.

we could make it cleverer, so that it can print any object whatsoever, not just any object that has an "asString" method that works properly. You know, like this one:

object { 
   method asString { Exception.raise "BOOM" }       
}

[kjx]

One way to think about this is what is the type of print:

   method print ( _ : type { } )                                   // print can print anything
   method print ( _ : type { asString -> String } )      // print can print anything that can be converted to a String
   method print ( _ : String )                                     // print can only print Strings