Merge github.com:grpc/grpc into reuse_port

BUILD

Makefile

PYTHON-MANIFEST.in

Rakefile

binding.gyp

build.yaml

config.m4

doc/PROTOCOL-HTTP2.md

doc/compression.md

examples/csharp/helloworld/GreeterClient/Program.cs

examples/csharp/route_guide/RouteGuideClient/Program.cs

...ective-c/auth_sample/AuthSample.xcodeproj/project.pbxproj

examples/objective-c/auth_sample/AuthTestService.podspec

examples/objective-c/helloworld/HelloWorld.podspec

...jective-c/helloworld/HelloWorld.xcodeproj/project.pbxproj

...s/objective-c/route_guide/Misc/Base.lproj/Main.storyboard

examples/objective-c/route_guide/RouteGuide.podspec

...-c/route_guide/RouteGuideClient.xcodeproj/project.pbxproj

examples/objective-c/route_guide/ViewControllers.m

gRPC.podspec