:lipstick: g_events => copied_events.
Fix erasing the wrong key.
Do not allocate memory on heap in new thread.

It seems that doing it would cause misterious crash on Windows, this is
only a workaround and we should find the root cause in future.
Do not call uv_mutex_unlock mannually, which is error-prone.
Fix iterating the FILE_NOTIFY_INFORMATION structure.
:lipstick: Fix typos.
Remove the hack to avoid heap allocation, it's not needed any more.
Merge pull request #3 from atom/cz-fix-win32

Fix bugs of Windows port