Add base functions.
Add pod documents.
Update pod documents.
Add perlcritic test
Cosmetic change using Test::Perl::Critic
Rename perlcritic test.
Fix typo.
Add pod coverage test
Change private subroutine name.
Add synopsis test.
Fix synopsis code.
Rename pod synopsis test.
Add _max() and _min() test
Add validate test.
Fix validator.
Change pod.
Change url.
Change pod.
Fix typo.
Rename tests.