docs for FileGatherer
Merge pull request #56 from Songmu/doc/FileGatherer

docs for FileGatherer
Ignore directories start with a dot if include_dotfiles is false

For compatible with Dist::Milla.
Merge pull request #57 from Songmu/feature/ignore-dot-directory

Ignore directories start with a dot if include_dotfiles is false
If Metadata already has the name from Makefile/Build/META, then no need parse POD to get the name
Merge branch 'master' of github.com:tokuhirom/Minilla
Fixed "Use of uninitialized value $name in substitution (s///) at lib/Minilla/Metadata.pm line 55." error.
more verbose output when migrating the module does not contains pod.