9.4 changes:
- updated version to 9.4
    bintar README NOTICE makefiles/Mf-install.in scheme.1.in
    c/Makefile.i3nt c/Makefile.a6nt c/Makefile.ti3nt c/Makefile.ta6nt
    mats/bldnt.bat workarea c/scheme.rc s/7.ss s/cmacros.ss
    release_notes/release_notes.stex csug/csug.stex
- added missing include
    killme.c
- added new mat verifying that primitives raise exceptions for invalid
  arguments based on primdata.ss signatures.  fixed some of those
  signatures, which weren't otherwise used except for arity checking.
  fixed some issues turned up by the test with who reports errors
  and how.
    primdata.ss, 5_1.ss, 7.ss, compile.ss, cpnanopass.ss, fasl.ss,
    interpret.ss, io.ss, record.ss, syntax.ss,
    primvars.ms, 5_1.ms, 7.ms, 8.ms, record.ms, mats/Mf-base,
    root-experr*, patch*
- string comparisons (string=?, string-ci<?, etc.) now get out fast
  when handed eq arguments.
    5_4.ss
- changed representation of most-negative iptr, I32, and I64 to make
  Visual C compiler happy.  updated windows make files, which had
  fallen out of date.  added missing hsrc= files sort.h and thread.h
  so they show up in the Windows workarea c directory.
    cmacros.ss,
    fasl.c, number.c, c/Mf-base, c/Makefile.{t,}{i3,a6}nt
- The scheme.h definition of Sfixnum(x) now uses multiply rather than
  left shift to avoid counting on the behavior of << on negative numbers,
  which is undefined in C.
    mkheader.ss
- Fixed a couple of casts, one harmless and the other causing
  Sinteger64_value to return 0 for the most-negative I64 on 32-bit
  builds.
    number.c
- The configure-generated Makefile distclean target no longer removes
  zlib and nanopass, since they are logically part of the git clone.
  It does run make distclean in zlib.
    makefiles/Makefile.in
- converted s_test_schlib shifts of -1 to equivalent shifts of 1 to
  avoid undefined left-shift behavior on negative numbers.
    prim5.c
- added if(---) {} wrapper around call to WRITE in display macro to
  silence unused return-value warnings.
    prim5.c
- liberalized get-mode check for ../mats.  it's not our business whether
  people make their directories group and/or other writeable.
    6.ms
- make test now prints the actual relative path to summary in the
  "check summary" message, whether invoked from the top-level directory
  or from the workarea.
    Makefile.in, Makefile-workarea.in
- configure now just uses cat to copy Makefile-workarea.in to $w/workarea,
  since the file is presently the same regardless of the configuration.
    configure
- fixed time-utc->date test in mat time&date-printing to work regardless of
  what locale (and time zone) the host machine has set.
    date.ms
- fixed date->time-utc to honor the zone-offset field when converting a date
  object to a time-utc object.
    stats.c,
    date.ms
- fixed incorrect handling of library-extension when searching wpo files
    compile.ss,
    7.ms
- modified floatify_normalize to properly round denormalized results.
  obviated scale_float in the process.
    number.c,
    ieee.ms
- fixed 0eNNNN for large NNNN to produce 0.0 rather than infinity
    strnum.ss,
    5_3.ms
- the reader now raises an exception with condition type implementation
  restriction (among the other usual lexical condition types), and
  string->number now raises #f, for #e<m>@<a>, where <m> and <a> are
  nonzero integers, since Chez Scheme can't represent polar numbers other
  than 0@<n> and <n>@0 exactly.  <m>@<a> still produces an inexact result,
  i.e., we're still extending the set of inexact numeric constants beyond
  what R6RS dictates.  doing this required a rework of $str->num, which
  turned into a fairly extensive rewrite that fixed up a few other minor
  issues (like r6rs:string->number improperly allowing 1/2e10) and
  eliminated the need for consumers to call $str->num twice in cases
  where it can actually produce a number.  added some related new tests,
  including several found missing by profiling.  added a couple of
  checks to number->string the absence of which was causing argument
  errors to be reported by other routines.
    strnum.ss, exceptions.ss, read.ss
    5_3.ms, 6.ms, root-experr*, patch*
- added pdtml flag, which if set to t causes profile-dump-html to be
  called at the end of a mat run.
    mats/Mf-base
- compile-whole-program and compile-whole-library now copy the hash-bang
  line from the wpo file (if it has one) to the object file.
    compile.ss,
    7.ms
- stex is now a submodule.  csug/Makefile and release_notes/Makefile
  set and use the required Scheme and STEXLIB variables accordingly.
  they default the machine type to a6le, but this can be overridden
  and is by the generated top-level Makefile.  the generated top-level
  Makefile now has a new docs target that runs make in both csug and
  release_notes, and an updated distclean target that cleans the same.
  the annoying csug Makefile .fig.pdf rule redefinition is now gone.
  copyright.stex and csug.stex now list May 2016 as the revision month
  and date; this will have to be updated for future releases.
    configure, makefiles/Makefile.in,
    csug/Makefile, copyright.stex, csug.stex,
    release_notes/Makefile
- added custom install options.  workarea creates an empty config.h,
  and configure creates a config.h that sets the default scheme heap
  path and scheme-script name based on the actual configuration.
    configure, newrelease, workarea, checkin,
    c/Mf-base, scheme.c, main.c,
    Mf-install.in
- renamed the installed example directory from lib to examples.
    Mf-install.in,
    scheme.1.in
- added force option to gzip during man page install to prevent gzip from
  asking for permission to overwrite existing man page files.
    Mf-install.in
- removed ~/lib/csv%v/%m from the default scheme heap path on unix-like
  systems.  documented inclusion of %x\..\..\boot\%m in the Windows
  default scheme heap path.
    main.c,
    use.stex
- added new configuration options: --installbin, --installlib,
  --installschemename, --installpetitename, and --installscriptname.
    configure
- updated the example library link to the nanopass framework.
    CONTRIBUTING.md
- now cleaning up petite.1 and scheme.1 left behind by make install
    Makefile-workarea.in, checkin
- now removing workarea after cleaning csug and release_notes so
  Mf-stex (included from csug/Makefile and release_notes/Makefile)
  doesn't complain trying to determine the machine type.
    Makefile.in
- added installsh support for --ifdiff so the csug make file can use it
  for the install target.
    installsh,
    csug/Makefile
- added instructions for building (cross-compiling) a boot file for
  a supported machine type for which a boot file is not built by default.
    BUILDING
- corrected CHEZSCHEMELIBS and CHEZSCHEMEEXTS index entries to be
  CHEZSCHEMELIBDIRS and CHEZSCHEMELIBEXTS.
    use.stex
- updated to curl stex version 1.2.1
    configure
- updated the fix to S_mktime to work on windows.  the struct tm
  structure on windows does not have the tm_gmtoff field used in the
  mac and linux version of the code.
    stats.c
- updated the Windows makefiles for building and testing to remove links for
  files that no longer exist, which was getting in the way of creating links
  for files that do exist.  Also updated the build batch file for Windows to
  compile the nanopass framework separately before building the rest of the
  scheme compiler and libraries.
    s/Mf-{a6,i3,ta6,ti3}nt, s/bldnt.bat,
    mats/Mf-{a6,i3,ta6,ti3}nt
- updated the read me to include a link to the Chez Scheme project page.
    README.md
- fixed embarrassing typo in read me.
    README.md
- profiler's html output refresh: mark the files as HTML5 rather
  than HTML4; use target attributes rather than onclick events to
  open links in specific windows; add a missing table row element;
  replace the deprecated name attribute with an id attribute (and
  replace the anchors with spans); and replace the deprecated valign
  attribute with a style attribute.
    pdhtml.ss

9.4.1 changes:
- updated version to 9.4.1
    bintar BUILDING NOTICE makefiles/Mf-install.in scheme.1.in
    c/Makefile.i3nt c/Makefile.a6nt c/Makefile.ti3nt c/Makefile.ta6nt
    mats/bldnt.bat workarea c/scheme.rc s/7.ss s/cmacros.ss
    release_notes/release_notes.stex csug/csug.stex
- updated newrelease to produce the correct log-entry format and
  fixed the existing 9.4.1 log entry
    newrelease, LOG
- replaced a couple of tabs
    number.c
- updated the descriptions of statistics and related functions to
  reflect the Version 9.3.1 change from sstats structures to sstats
  records, with sstats times represented as time objects and sstats
  bytes and counts represented as exact integers; also updated the
  sstats-difference description to reflect that it no longer coerces
  negative differences to zero.  added a corresponding release note.
    system.stex,
    release_notes.stex
- added a cast to eliminate a warning
    c/number.c
- fixed bug in Windows version of directory-separator-predicate when
  path-* procedures are passed a path that is not a string.
    s/6.ss
- fixed bug in cp0 on Windows with $foreign-wchar?.
    s/cp0.ss
- Cygwin is now used on Windows, updated mats, eliminated unused killme
    BUILDING c/*nt c/Mf-base c/scheme.exe.manifest configure
    examples/Makefile mats/6.ms mats/Mf-* mats/foreign.ms mats/ftype.ms
    mats/patch-* mats/windows.ms s/Mf-*nt s/Mf-base workarea
    release_notes.stex
- fixed spelling of non-existent
    s/syntax.ss
- now forcing zlib configuration before compiling files that depend on
  the zlib header files, since zlib's configure script can modify the
  header files.  removed ZlibInclude variable, which no longer serves
  a purpose.
    c/Mf-*, c/Makefile.*nt
- removed unnecessary datestamp.c target
    c/Mf.*nt
- fixed unnessesary blocking in expeditor on Windows. 
    c/expeditor.c
- eliminated a couple of thread-safety issues and limitations on the
  sizes of pathnames produced by expansion of tilde (home-directory)
  prefixes by replacing S_pathname, S_pathname_impl, and S_homedir
  with S_malloc_pathname, which always mallocs space for the result.
  one thread-safety issue involved the use of static strings for expanded
  pathnames and affected various file-system operations.  the other
  affected the file open routines and involved use of the incoming
  pathname while deactivated.  the incoming pathname is sometimes if not
  always a pointer into a Scheme bytevector, which can be overwritten if a
  collection occurs while the thread is deactivated.  the size limitation
  corresponded to the use of the static strings, which were limited to
  PATH_MAX bytes.  (PATH_MAX typically isn't actually the maximum path
  length in contemporary operating systems.)  eliminated similar issues
  for wide pathnames under Windows by adding S_malloc_wide_pathname.
  consumers of the old routines have been modified to use the new
  routines and to free the result strings.  the various file operations
  now consistently treat a pathname with an unresolvable home directory
  as a pathname that happens to start with a tilde.  eliminated unused
  foreign-symbol binding of "(cs)pathname" to S_pathname.
    io.c, externs.h, new_io.c, prim5.c, scheme.c, prim.c
- various places where a call to close or gzclose was retried when
  the close operation was interrupted no longer do so, since this can
  cause problems when another thread has reallocated the same file
  descriptor.
    new_io.c
- now using vcvarsall type x86_amd64 rather than amd64 when the
  former appears to supported and the latter does not, as is the
  case with VS Express 2015.
    c/Mf-a6nt, c/Mf-ta6nt
- commented out one of the thread mats that consistently causes
  indefinite delays under Windows and OpenBSD due to starvation.
    thread.ms
- increased wait time for a couple of subprocess responses
    6.ms
- added call to collector to close files opened during iconv mats
  specifically for when mats are run under Windows with no iconv dll.
    io.ms
- fixed typo: VC/bin/vcvars64.bat => VC/bin/amd64/vcvars64.bat
    c/Mf-a6nt, c/Mf-ta6nt
- scheme_mutex_t now uses volatile keyword for owner and count fields
  because these fields can be accessed from multiple threads
  concurrently. Updated $yield and $thread-check in mats/thread.ms to
  be more tolerant of timing variability.
    c/types.h, mats/thread.ms, release_notes.stex