Merge github.com:grpc/grpc into tis-but-thy-name

.travis.yml

Makefile

build.json

gRPC.podspec

include/grpc++/impl/call.h

src/core/iomgr/pollset_windows.c

src/core/support/histogram.c

src/core/surface/completion_queue.c

src/objective-c/GRPCClient/private/GRPCSecureChannel.m

templates/gRPC.podspec.template

templates/tools/doxygen/Doxyfile.include

test/proto/messages.proto

test/proto/test.proto

tools/codegen/core/gen_hpack_tables.c

tools/doxygen/Doxyfile.c++

tools/doxygen/Doxyfile.c++.internal

tools/doxygen/Doxyfile.core

tools/doxygen/Doxyfile.core.internal

vsprojects/Grpc.mak