Add README for improved VMS::Stdio extension

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+This directory contains the source code for the Perl extension
+VMS::Stdio, which provides access from Perl to VMS-specific
+stdio functions.  For more specific documentation of its
+function, please see the pod section of Stdio.pm.
+
+                       *** Please Note ***
+
+This package is the direct descendant of VMS::stdio, but as of Perl
+5.002, the name has been changed to VMS::Stdio, in order to conform
+to the Perl naming convention that extensions whose name begins
+with a lowercase letter represent compile-time "pragmas", while
+extensions which provide added functionality have names whose parts
+begin with uppercase letters.  In addition, the functions
+vmsfopen and fgetname have been renamed vmsopen and getname,
+respectively, in order to more closely resemble related Perl
+I/O operators, which do not retain the 'f' from corresponding
+C routine names.
+
+A transitional interface to the old routine names has been
+provided, so that calls to these routines will generate a
+warning, and be routed to the corresponding VMS::Stdio
+routine.  This interface will be removed in a future release,
+so please update your code to use the new names.
+
+
+===> Installation
+
+This extension, like most Perl extensions, should be installed
+by copying the files in this directory to a location *outside*
+the Perl distribution tree, and then saying
+
+    $ perl Makefile.PL  ! Build Descrip.MMS for this extension
+    $ MMK               ! Build the extension
+    $ MMK test          ! Run its regression tests
+    $ MMK install       ! Install required files in public Perl tree
+
+
+===> Revision History
+
+1.0  29-Nov-1994  Charles Bailey  bailey@genetics.upenn.edu
+     original version - vmsfopen
+1.1  09-Mar-1995  Charles Bailey  bailey@genetics.upenn.edu
+     changed calling sequence to return FH/undef - like POSIX::open
+     added fgetname and tmpnam
+2.0  28-Feb-1996  Charles Bailey  bailey@genetics.upenn.edu
+     major rewrite for Perl 5.002: name changed to VMS::Stdio,
+     new functions added, and prototypes incorporated