[R6RS] Definitions in scripts

[Anton van Straaten]

Presumably the decision to require definitions to appear before 
expressions in library bodies applies to scripts, too.

However, the case for being more lenient about this in scripts seems 
much stronger to me.  Many scripts are by nature not highly structured, 
and requiring all definitions to appear before any expressions is 
tantamount to saying that when we say "script", we don't really mean it.

I propose that interspersing definitions and expressions in scripts 
should be allowed.

Anton