CDATA elements should not be parsed at all (and maintain carriage return)

[Michael]

Although XML specified to convert \r\n to \n, contens of CDATA should not be parsed.

>>> import sys
>>> import sys
>>> from lxml import etree
>>>
>>> print("%-20s: %s" % ('Python', sys.version_info))
Python : sys.version_info(major=2, minor=7, micro=9, releaselevel='final', serial=0)
>>> print("%-20s: %s" % ('lxml.etree', etree.LXML_VERSION))
lxml.etree : (3, 3, 5, 0)
>>> print("%-20s: %s" % ('libxml used', etree.LIBXML_VERSION))
libxml used : (2, 9, 2)
>>> print("%-20s: %s" % ('libxml compiled', etree.LIBXML_COMPILED_VERSION))
libxml compiled : (2, 9, 2)
>>> print("%-20s: %s" % ('libxslt used', etree.LIBXSLT_VERSION))
libxslt used : (1, 1, 28)
>>> print("%-20s: %s" % ('libxslt compiled', etree.LIBXSLT_COMPILED_VERSION))
libxslt compiled : (1, 1, 28)
>>> etree.fromstring('<test><![CDATA[\r\n]]></test>').text
'\n'