Add getExpiresIn() to IAuthData
Merge branch 'master' of github.com:box/box-java-sdk-v2 into add_expires_in_to_iauthdata
Merge branch 'master' of github.com:box/box-java-sdk-v2 into add_expires_in_to_iauthdata
Merge branch 'master' of github.com:box/box-java-sdk-v2 into add_expires_in_to_iauthdata
Merge pull request #175 from box/add_expires_in_to_iauthdata

Add "expires_in" to IAuthData interface