("\"We're all mad here.\" says the grinning cat.")
  >>> print line.pop(True)
    "We're all mad here."
  >>> print line.pop()
    "says"
  >>> print line.remainder()
    "the grinning cat."

  >>> line = ControlLine("\"this has a \\\" and \\\\ in it\" foo=bar more_data")
  >>> print line.pop(True, True)
    "this has a \" and \\ in it"

:param bool quoted: parses the next entry as a quoted value, removing the quotes
:param bool escaped: unescapes the string

:returns: **str** of the next space separated entry

:raises:
  * **ValueError** if quoted is True without the value being quoted
  * **IndexError** if we don't have any remaining content left to parse
FN)