Update README.md

fixed links
Merge pull request #37 from deckool/patch-1

Update README.md
Update github.cabal

exposing `Blobs`
Merge pull request #38 from deckool/patch-1

Update github.cabal
Bump version to 1.7.1
Changed the types of the githubOwnerGravatarId and detailedOwnerGravatarId fields in Definitions.hs from String to Maybe String to avoid problems with Null values being returned.
Merge pull request #39 from fernandocastor/master

Changed the types of the githubOwnerGravatarId and detailedOwnerGravatar...