simplify a EXE_FILES build
add use strict and warnings
remove unused options
remove redundant comments
remove DIST_AUTHOR option

the such option for Module::Build, but ExtUtils::MakeMaker isn't uses it
the AUTHOR option is enough
add the lost entry for the last release
avoid to check the non-existent dirs/categories
Merge pull request #3 from bor/fix/makefile

Sergiy Borodych removes the cobwebs from the build system.
Merge pull request #4 from bor/fix/changelog

Sergiy Borodych fixes the Changelog.
Merge pull request #5 from bor/fix/perl_dirs_and_cat

Sergiy Borodych removes non-existent categories from the scanning logic.