Used filepath.Join() to filepath.Join() in Home()
fix NormalizePath on windows
Merge pull request #25 from gabriel-samfira/fix-normalize-path-windows

fix NormalizePath on windows
Return a concrete metadata type from NewMetadata()
Merge pull request #17 from aznashwan/upstream

Changed path.Join() into filepath.Join() in Home()
Merge pull request #26 from ericsnowcurrently/return-concrete-metadata-type

Return a concrete metadata type from NewMetadata().