Merge pull request #209 from yang-g/interopclient

include/grpc++/server_credentials.h

include/grpc/grpc.h

include/grpc/support/sync_generic.h

src/compiler/ruby_generator.cc

src/core/channel/census_filter.c

src/core/channel/channel_stack.c

src/core/channel/channel_stack.h

src/core/channel/child_channel.c

src/core/channel/client_channel.c

src/core/channel/connected_channel.c

src/core/channel/http_client_filter.c

src/core/channel/http_filter.c

src/core/channel/metadata_buffer.c

src/core/channel/noop_filter.c

src/core/iomgr/alarm_heap.c

src/core/iomgr/pollset_windows.h

src/core/iomgr/tcp_server_posix.c

src/core/security/credentials.h

src/core/support/histogram.c

src/core/surface/call.c