CPP-140 - Catch SIGPIPE in IOWorker threads

Does this work on Windows? Wondering if SIGPIPE fails on uv_signal_start-->uv__signal_register
https://github.com/joyent/libuv/blob/v0.10/src/win/signal.c#L263
https://github.com/joyent/libuv/blob/v0.10/src/win/signal.c#L292
https://github.com/joyent/libuv/blob/v0.10/src/win/signal.c#L189