Merge github.com:google/grpc

Makefile

build.json

include/grpc++/create_channel.h

include/grpc++/credentials.h

include/grpc++/impl/internal_stub.h

include/grpc++/impl/rpc_method.h

include/grpc++/impl/rpc_service_method.h

include/grpc/support/log.h

include/grpc/support/port_platform.h

include/grpc/support/time.h

src/compiler/cpp_generator.cc

src/compiler/go_generator.cc

src/compiler/go_generator.h

src/compiler/go_plugin.cc

src/core/channel/census_filter.c

src/core/channel/connected_channel.c

src/core/channel/http_server_filter.c

src/core/security/security_context.c

src/core/statistics/census_init.c

src/core/statistics/census_rpc_stats.c