Merge pull request #34 from ctiller/api

include/grpc/grpc.h

src/core/surface/byte_buffer.c

src/core/surface/call.c

src/cpp/client/channel.cc

src/cpp/stream/stream_context.cc

src/cpp/stream/stream_context.h

test/core/echo/client.c

test/core/end2end/cq_verifier.c

test/core/end2end/cq_verifier.h

test/core/end2end/dualstack_socket_test.c

test/core/end2end/dualstack_socket_test.c.orig

test/core/end2end/no_server_test.c

test/core/end2end/tests/cancel_after_accept.c

...ore/end2end/tests/cancel_after_accept_and_writes_closed.c

test/core/end2end/tests/cancel_after_invoke.c

test/core/end2end/tests/cancel_before_invoke.c

test/core/end2end/tests/census_simple_request.c

test/core/end2end/tests/disappearing_server.c

...end/tests/early_server_shutdown_finishes_inflight_calls.c

test/core/end2end/tests/invoke_large_request.c