fixes for the build process

See #8
```bash
ls -lah
# total 56K
# rwxr-xr-x 10 kent kent 4.0K Aug 21 13:41 ..
# -rw-r--r--  1 kent kent   25 Aug 21 13:41 .gitignore
# -rw-r--r--  1 kent kent  24K Aug 21 13:41 ChangeLog
# -rw-r--r--  1 kent kent 1.1K Aug 21 13:41 Makefile.PL
# drwxr-xr-x  2 kent kent 4.0K Aug 21 13:41 bin
# drwxr-xr-x  3 kent kent 4.0K Aug 21 13:41 lib
# drwxr-xr-x  2 kent kent 4.0K Aug 21 13:41 t
perl Makefile.PL 
# Warning: prerequisite Log::Agent 0 not found.
# Warning: prerequisite Shell::EnvImporter 0 not found.
# Warning: NAME must be a package name
# Generating a Unix-style Makefile
# Writing Makefile for g-cpan
# Writing MYMETA.yml and MYMETA.json
make manifest
# /home/kent/perl5/perlbrew/perls/5.21.1-sdbm/bin/perl5.21.1 "-MExtUtils::Manifest=mkmanifest" -e mkmanifest
# Added to MANIFEST: bin/g-cpan
# Added to MANIFEST: ChangeLog
# Added to MANIFEST: lib/Gentoo.pm
# Added to MANIFEST: lib/Gentoo/CPAN.pm
# Added to MANIFEST: lib/Gentoo/Portage.pm
# Added to MANIFEST: lib/Gentoo/UI/Console.pm
# Added to MANIFEST: Makefile.PL
# Added to MANIFEST: MANIFEST
# Added to MANIFEST: t/00Gentoo.t
# Added to MANIFEST: t/01config.t
# Added to MANIFEST: t/02ebuilds_read.t
# Added to MANIFEST: t/10cpan_packages.t
make dist
# make dist
# rm -rf g-cpan-0.16.5
# /home/kent/perl5/perlbrew/perls/5.21.1-sdbm/bin/perl5.21.1 "-MExtUtils::Manifest=manicopy,maniread" \
# 	-e "manicopy(maniread(),'g-cpan-0.16.5', 'best');"
# mkdir g-cpan-0.16.5
# mkdir g-cpan-0.16.5/t
# mkdir g-cpan-0.16.5/lib
# mkdir g-cpan-0.16.5/lib/Gentoo
# mkdir g-cpan-0.16.5/bin
# mkdir g-cpan-0.16.5/lib/Gentoo/UI
# Generating META.yml
# Generating META.json
# tar cvf g-cpan-0.16.5.tar g-cpan-0.16.5
# g-cpan-0.16.5/
# g-cpan-0.16.5/lib/
# g-cpan-0.16.5/lib/Gentoo.pm
# g-cpan-0.16.5/lib/Gentoo/
# g-cpan-0.16.5/lib/Gentoo/UI/
# g-cpan-0.16.5/lib/Gentoo/UI/Console.pm
# g-cpan-0.16.5/lib/Gentoo/CPAN.pm
# g-cpan-0.16.5/lib/Gentoo/Portage.pm
# g-cpan-0.16.5/Makefile.PL
# g-cpan-0.16.5/t/
# g-cpan-0.16.5/t/10cpan_packages.t
# g-cpan-0.16.5/t/02ebuilds_read.t
# g-cpan-0.16.5/t/00Gentoo.t
# g-cpan-0.16.5/t/01config.t
# g-cpan-0.16.5/META.yml
# g-cpan-0.16.5/ChangeLog
# g-cpan-0.16.5/bin/
# g-cpan-0.16.5/bin/g-cpan
# g-cpan-0.16.5/META.json
# g-cpan-0.16.5/MANIFEST
# rm -rf g-cpan-0.16.5
# gzip --best g-cpan-0.16.5.tar
# Created g-cpan-0.16.5.tar.gz
```