Make subproc_call to use our EvPopen class

            # libev handles zombies

def subproc_call(args, stdin=None):

def subproc_call(main_loop, args, stdin=None):

    """

    :param args: arguments for subprocess call

    :param stdin: stdin data as string

    """

    proc = subprocess.Popen(args, bufsize=4096, stdin=subprocess.PIPE,

                            stdout=subprocess.PIPE, stderr=subprocess.STDOUT)

    proc = EvPopen(main_loop, args, bufsize=4096, stdin=subprocess.PIPE,

                   stdout=subprocess.PIPE, stderr=subprocess.STDOUT,

                   close_fds=True)

    result, _ = proc.communicate(stdin)

    if proc.returncode != 0:

        raise subprocess.CalledProcessError(proc.returncode,