calc: C-style arbitrary precision system Files

The following are the changes in this release:

    For Apple OS X / Darwin target:

    	MACOSX_DEPLOYMENT_TARGET is no longer defined
	using clang compiler

	By default, -install-name is used when forming shared libs.
	To force -install-name to not be used, set SET_INSTALL_NAME=no.

    The have_stdvs.c test uses <stdlib.h> and fixed va_start() test call
    that didn't use last arg.

    Fixed math_fmt (printf) in value.c where a LEN (SB32) be printed as %d.

    Fixed a significant bug where that resulted in an incorrect
    complex number comparison.  Thanks goes to David Binderman
    <dcb314 at hotmail dot com> for identifying the subtle typo!

    Make minor fixes to the make depend rule.

    Fixed places were calc defined a reserved identifier that
    begin with either __ or _[A-Z].  For example, __FILE_H__ has
    been replaced with INCLUDE_FILE_H.

    Fixed the addall3 example in the script help file.  Thanks for this
    fix goes to Igor Furlan <igor dot furlan at gmail dot com>.

    We made important fixes to the calc command line history:

	Fixed a bug in the command line history where calc would somtimes
	crash.  There was code that used memcpy() instead of memmove()
	that could corrupt the command line history when entering a
	into into history that was similar to a previous entry.  Thanks
	goes to Einar Lielmanis <einars at spicausis dot lv> for first
	identifying this mistake.

	The calc command line history code, in general was not robust.
	We made use a patch from Mathias Buhr <napcode at users dot sf
	dot net>, that while it uses a bit more memory: is much more
	flexible, readable and robust.  This patch replaced the improer
	use of memcpy() (see above) with better code.  Thanks!

    The alg_config.cal calc resource file has been reworked to produce
    better diagnostics while attempting to determine the ideal values
    for mul2, sq2, and pow2.  However, it has been shown that this
    code is not correct.  Suggestions for a replacement are welcome!

   	calc -u 'read alg_config; config("user_debug", 2),; best_mul2();'
   	calc -u 'read alg_config; config("user_debug", 2),; best_sq2();'
   	calc -u 'read alg_config; config("user_debug", 2),; best_pow2();'

    Fixed a number of pedantic compiler warnings.

    Removed -W and -Wno-comment from the the CCWARN makefile variable.

    Removed no_implicit.arg makefile rule.  Removed HAVE_NO_IMPLICIT
    makefile variable.  Removed no_implicit.c source file.

    Added WNO_IMPLICT makefile variable to hold the compiler flag
    -Wno-implicit for use on selective compile lines.

    Added WNO_ERROR_LONG_LONG makefile variable to hold the compiler flag
    -Wno-error=long-long for use on selective compile lines.

    Added WNO_LONG_LONG makefile variable to hold the compiler flag
    -Wno-long-long for use on selective compile lines.

    The makefile variable ${MKDIR_ARG} has been replaced with just -p.

    Minor fixes were made to the calc.spec.in file.

    The target rpm architecture changed from i686 to x86_64.  For those
    who do not run machine with x86_64, we continue to release a src
    rpm. For those without the ability to process an rpm, we will always
    to release src tarball.

    When building the libcalc and libcustcalc shared  libraries,
    ONLY the .so and .so.${VERSION} files are created.  The .so is
    a symlink to the .so.${VERSION} file.  Here ${VERSION} is the
    full "w.x.y.z" calc version.