[plt-scheme] changing #lang planet

Is anyone using `#lang planet'? It doesn't work the way I expected, and
I'm planning to change it.

Currently, `#lang planet' uses the specified package/library to get a
kind of expression reader, which it calls until EOF to build up a
module body. I think `#lang planet' should instead treat the
package/library as the full-module reader, like `#lang' itself.


Matthew