Merge branch 'master' of github.com:grpc/grpc into decompression

BUILD

Makefile

build.json

gRPC.podspec

src/core/iomgr/tcp_windows.c

src/objective-c/GRPCClient/GRPCCall.m

src/php/README.md

src/php/bin/run_tests.sh

src/php/ext/grpc/CREDITS

src/php/ext/grpc/LICENSE

src/php/ext/grpc/README.md

src/php/ext/grpc/package.xml

src/ruby/.rspec

src/ruby/spec/spec_helper.rb

templates/Makefile.template

templates/gRPC.podspec.template

tools/doxygen/Doxyfile.core.internal

tools/jenkins/grpc_jenkins_slave/Dockerfile

tools/jenkins/run_jenkins.sh

vsprojects/grpc/grpc.vcxproj