Adding sexp_current_input_port(ctx) and sexp_current_output_port(ctx) macros.
Adding exception-protect.
Adding file-truncate.
Adding call-with-locked-file utility.
Fixing bug in exception-protect.
Handling reraise properly in exception-protect.
Removing call-with-locked-file for now.
Making http ports binary.
Adding bytevector support to base64 lib.
Adding bytevector support to quoted printable.
Exporting bytevector API.
Preserving binary data as bytevectors in mime parsing.
Adding port->bytevector.
Adding temporary zlib hack.