[racket] typesetting scribble/lp files individually

With the current implementation of `scribble/lp`, this looks difficult.

I think we need to reimplement `scribble/lp` to use submodules, and
then this should be easy --- by having `scribble/lp` introduce a `doc`
submodule that `raco scribble` would pick up instead of the module's
body.

At Mon, 16 Dec 2013 07:03:41 -0700, Matias Eyzaguirre wrote:
> Hi all,
> 
> I’ve been using scribble/lp for a little while, but it’s starting to get 
> annoying that using it seems to require a second module to lp-include the 
> scribble/lp module in order to be able to typeset/render it. It doesn’t look 
> like there’s a way to do it, but I thought I’d ask. If there isn’t, would it 
> be possible to add one?
> 
> Even just having the  pdf and html buttons in the DrRacket toolbar be usable 
> with scribble/lp files would greatly reduce the tedium of switching back and 
> forth between my program and a file that just contains a call to lp-include.
> 
> Thanks,
>     Matias Eyzaguirre
> ____________________
>   Racket Users list:
>   http://lists.racket-lang.org/users