Merge github.com:grpc/grpc into c3+r

WORKSPACE

include/grpc++/impl/codegen/call.h

include/grpc++/impl/codegen/sync_stream.h

src/core/lib/surface/call.c

src/cpp/server/server_cc.cc

src/php/ext/grpc/call.c

src/php/ext/grpc/call_credentials.c

src/php/ext/grpc/channel.c

src/php/ext/grpc/channel_credentials.c

src/php/ext/grpc/server.c

src/php/ext/grpc/server_credentials.c

src/php/ext/grpc/timeval.c

test/core/client_channel/BUILD

test/core/client_channel/resolvers/BUILD

test/core/fling/BUILD

test/core/http/BUILD

test/core/iomgr/BUILD

test/core/json/BUILD

test/core/network_benchmarks/BUILD

test/core/security/BUILD