Node.path.resolve returns a String.
Init the static members directly without __init__.
Merge commit '78c8706668a3c8b6cbca93f4481d2920fe8f8c59' into dev
NodeChildProcess.kill: signal is optional.
See http://nodejs.org/api/child_process.html#child_process_child_kill_signal
Merge branch 'child_process_child_kill_signal' into dev
Merge branch 'dev'