Pass debug messages on to someone else to handle - Windows specific

[sparkpunkd]

Some Windows libraries use OutputDebugString() to log a message to a debugger. This works by throwing an exception and then a debugger being a registered exception handler. For example, th Google family of chromium-based APIs do this, including libwebrtc that is part of node-webrtc.

Unfortunately, node-segfault-handler intercepts these exceptions and reports them as SIGSEGV, printing a stack trace and marks them as handled by returning EXCEPTION_EXECUTE_HANDLER. In this case and implemented by this PR, it would be better to not handle the exception and pass it onto any other interested party with EXCEPTION_CONTINUE_SEARCH.

Also, as part of the debugging process, the code can try to set the thread name via exception. This PR also passes this exception onwards and upwards.