* Catch errors in reading the module text and raise them as hopeless   too. * Use `error-display-handler' instead of `let/ec' hack * Expand the module expression, and if there's an error, try a bare   language-only module so the repl is still working (but no   definitions, of course)
* Catch errors in reading the module text and raise them as hopeless
  too.
* Use `error-display-handler' instead of `let/ec' hack
* Expand the module expression, and if there's an error, try a bare
  language-only module so the repl is still working (but no
  definitions, of course)

svn: r10508

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket