Merge pull request #22 from ulule/feat/add-open-with-stat

feat: add open with stat

Merge pull request #19 from ulule/feat/detect-content-type-from-content

feat: fallback to detecting content type from content

Merge pull request #15 from ulule/feat/make-the-open-method-return-er…

…r-not-exist

feat: make the Open method return ErrNotExist

Merge pull request #14 from ulule/fix/gcs/always-close-writer-on-save

fix(gcs): always close writer on save

fix(gcs): return close error

Create README.md

Merge pull request #12 from theromis/master

google cloud support