New in release 0.4.

New interface to scheme_apply() that makes it easier not to do
unnecessary consing at function application time.
scheme_apply_to_list() is still around for backward compatibility.

A first cut at generic input and output ports.  File and string ports
have been implemented on top of this interface, with the addition of
open-input-string, with-input-from-string, write-to-string, and
display-to-string.  It should be fairly easy to extend libscheme with
new kinds of input and output ports.

An upgrade to version 4.2 of the Boehm garbage collector.

A libscheme extension providing bindings to the POSIX file system
functions. 

A copy of the paper "libscheme: Scheme as a C Library" which will
appear in the proceedings of the 1994 USENIX Symposium on Very High
Level Languages.

Many bug fixes.
