Merge branch 'update-minio-dependency'

Godeps/Godeps.json

.../_workspace/src/github.com/minio/minio-go/CONTRIBUTING.md

Godeps/_workspace/src/github.com/minio/minio-go/README.md

...space/src/github.com/minio/minio-go/api-error-response.go

Godeps/_workspace/src/github.com/minio/minio-go/api-get.go

..._workspace/src/github.com/minio/minio-go/api-presigned.go

...ce/src/github.com/minio/minio-go/api-put-object-common.go

...ps/_workspace/src/github.com/minio/minio-go/api-remove.go

Godeps/_workspace/src/github.com/minio/minio-go/api-stat.go

Godeps/_workspace/src/github.com/minio/minio-go/api.go

...e/src/github.com/minio/minio-go/api_functional_v2_test.go

...e/src/github.com/minio/minio-go/api_functional_v4_test.go

..._workspace/src/github.com/minio/minio-go/api_unit_test.go

.../_workspace/src/github.com/minio/minio-go/bucket-cache.go

...ub.com/minio/minio-go/examples/play/presignedgetobject.go

...thub.com/minio/minio-go/examples/s3/presignedgetobject.go

...ace/src/github.com/minio/minio-go/request-signature-v2.go

shells/cache.go