Merge github.com:google/grpc into gcov

.gitmodules

INSTALL

Makefile

src/node/README.md

src/node/binding.gyp

src/node/byte_buffer.cc

src/node/byte_buffer.h

src/node/call.cc

src/node/call.h

src/node/channel.cc

src/node/channel.h

src/node/client.js

src/node/common.js

src/node/completion_queue_async_worker.cc

src/node/completion_queue_async_worker.h

src/node/credentials.cc

src/node/credentials.h

src/node/event.cc

src/node/event.h

src/node/examples/math.proto