vendor update

vendor.conf

vendor/github.com/gorilla/websocket/.gitignore

vendor/github.com/gorilla/websocket/.travis.yml

vendor/github.com/gorilla/websocket/AUTHORS

vendor/github.com/gorilla/websocket/LICENSE

vendor/github.com/gorilla/websocket/README.md

vendor/github.com/gorilla/websocket/client.go

vendor/github.com/gorilla/websocket/client_clone.go

vendor/github.com/gorilla/websocket/client_clone_legacy.go

vendor/github.com/gorilla/websocket/compression.go

vendor/github.com/gorilla/websocket/conn.go

vendor/github.com/gorilla/websocket/conn_read.go

vendor/github.com/gorilla/websocket/conn_read_legacy.go

vendor/github.com/gorilla/websocket/doc.go

vendor/github.com/gorilla/websocket/json.go

vendor/github.com/gorilla/websocket/mask.go

vendor/github.com/gorilla/websocket/mask_safe.go

vendor/github.com/gorilla/websocket/prepared.go

vendor/github.com/gorilla/websocket/server.go

vendor/github.com/gorilla/websocket/util.go