Merge github.com:grpc/grpc into swappy

.travis.yml

Makefile

build.json

gRPC.podspec

include/grpc/grpc.h

src/compiler/cpp_generator.cc

src/core/channel/call_op_string.c

src/core/iomgr/endpoint_pair_windows.c

src/core/iomgr/iocp_windows.c

src/core/iomgr/iomgr_windows.c

src/core/iomgr/pollset_kick_windows.h

src/core/iomgr/pollset_windows.c

src/core/iomgr/pollset_windows.h

src/core/iomgr/socket_windows.c

src/core/iomgr/socket_windows.h

src/core/iomgr/tcp_client_windows.c

src/core/iomgr/tcp_posix.c

src/core/iomgr/tcp_server_windows.c

src/core/iomgr/tcp_windows.c

src/core/profiling/basic_timers.c