Import Upstream version 1.11.0

.github/ISSUE_TEMPLATE

.travis.yml

AUTHORS

CONTRIBUTING.md

Documentation/compression.md

Documentation/encoding.md

Documentation/gomock-example.md

Documentation/grpc-auth-support.md

Documentation/grpc-metadata.md

Documentation/rpc-errors.md

Documentation/server-reflection-tutorial.md

Documentation/versioning.md

LICENSE

Makefile

README.md

backoff.go

backoff_test.go

balancer.go

balancer/balancer.go

balancer/base/balancer.go