Error renaming file in Win32, if the file already exists #283

Calling fs__rename (src/win/fs.c) in Windows returns an error if the file on a new path already exists.
The behavior of "rename" (Linux) and "_wrename" (Windows) is different:

rename http://linux.die.net/man/3/rename : "If the link named by the new argument exists, it shall be removed and old renamed to new."

_wrename http://msdn.microsoft.com/en-us/library/zw5t957f.aspx : "The new name must not be the name of an existing file or directory."

To implement rename a file similar to the function "rename" (Linux) is better to use a function MoveFileEx http://msdn.microsoft.com/en-us/library/windows/desktop/aa365240.aspx

For example (src/win/fs.c):

void fs__rename(uv_fs_t* req, const wchar_t* path, const wchar_t* new_path) {
  int result = (TRUE==MoveFileEx(path, new_path, MOVEFILE_REPLACE_EXISTING) ? 0 : -1);
  SET_REQ_RESULT(req, result);
}