Release notice: T version 0.54 on Vax

[Jonathan Rees <Rees at YALE>]

Just what you've all been waiting for...

New features:

- Faster startup.  Now fasloads only one file, not 18.
- REM-PROPERTY (a.k.a. REM) exists.  Sort of like conventional REMPROP.
- Some math functions (COS, SIN, EXP, LOG, SQRT, ...) are available.
  See BRIEF.DOC.
- The VAR-MAGIC special form seems to work.

Bugs fixed:

- BIND and MAP have been fixed.
- PP works on macros.  (To the extent it works at all.)
- Doing a BACKTRACE inside a memory protection error, or inside a ^C
  out of T code, now seems to work.