Import of RIZEN/Box-Calc-1.0001 from CPAN.

gitpan-cpan-distribution: Box-Calc
gitpan-cpan-version:      1.0001
gitpan-cpan-path:         RIZEN/Box-Calc-1.0001.tar.gz
gitpan-cpan-author:       RIZEN
gitpan-cpan-maturity:     released