Log Message:
Update to 1.999800

Upstream changes:
2016-11-04 v1.999727 pjacklam

 * Skip test exceeding the range of VAX floating point number in t/bigintpm.inc
   (CPAN RT 118468).

 * Fix typo in lib/Math/BigInt.pm (CPAN RT 118550).

2016-11-15 v1.999800 pjacklam

 * Upgrade bundled Module::Install from version 1.16 to version 1.17.

 * Add Math::BigInt::Lib (lib/Math/BigInt/Lib.pm), a parent class for
   Math::BigInt backend libraries.

 * Use objects in Math::BigInt::Calc, not just array refs. Also use OO-style,
   i.e., use $class->_add($x, $y) rather than _add($class, $x, $y).

 * Not all library methods modify the invocand, so call library methods as,
   e.g, $x = $LIB->method($x, $y) rather than just $LIB->method($x, $y).

 * Math::BigInt::Calc is now a subclass of Math::BigInt::Lib.

 * Add Math::BigInt::Lib::Minimal (t/Math/BigInt/Lib/Minimal.pm) for testing
   inheritance from Math::BigInt::Lib.

 * Minor simplification in Math::BigInt::Calc->_str().

 * Speed up Math::BigInt::Calc->_root().

 * Remove test files that were included in the previous release by accident.

 * Add more tests and use more verbose output in some tests.

 * Fix typo in lib/Math/BigFloat.pm

 * Fix documentation error in lib/Math/Calc.pm

 * Use Config::Tiny and an .ini file to handle the library specific
   configuration for the author-lib*.t test files.