Added vendor files

vendor/gopkg.in/square/go-jose.v1/BUG-BOUNTY.md

vendor/gopkg.in/square/go-jose.v1/CONTRIBUTING.md

vendor/gopkg.in/square/go-jose.v1/LICENSE

vendor/gopkg.in/square/go-jose.v1/README.md

vendor/gopkg.in/square/go-jose.v1/asymmetric.go

vendor/gopkg.in/square/go-jose.v1/cipher/cbc_hmac.go

vendor/gopkg.in/square/go-jose.v1/cipher/concat_kdf.go

vendor/gopkg.in/square/go-jose.v1/cipher/ecdh_es.go

vendor/gopkg.in/square/go-jose.v1/cipher/key_wrap.go

vendor/gopkg.in/square/go-jose.v1/crypter.go

vendor/gopkg.in/square/go-jose.v1/doc.go

vendor/gopkg.in/square/go-jose.v1/encoding.go

vendor/gopkg.in/square/go-jose.v1/json/LICENSE

vendor/gopkg.in/square/go-jose.v1/json/README.md

vendor/gopkg.in/square/go-jose.v1/json/decode.go

vendor/gopkg.in/square/go-jose.v1/json/encode.go

vendor/gopkg.in/square/go-jose.v1/json/indent.go

vendor/gopkg.in/square/go-jose.v1/json/scanner.go

vendor/gopkg.in/square/go-jose.v1/json/stream.go

vendor/gopkg.in/square/go-jose.v1/json/tags.go