#4 XML Marshaler needs to properly handle "]]>" in strings

[Brad Koehn]

To preserve formatting, the marshaler encodes data in a
CDATA block. If the block contains the CDATA end tag
"]]>", the data should be encoded thusly:

Source data: Hello]]>World

Marshaled data: <![CDATA[Hello]]>]]&lt;<![CDATA[World]]>

Simply split the source text on "]]>", and encode each
chunk in a CDATA, separated by a text node containing
"]]>". Need to see if this is what dom4j does on the
Java side.

[Brad Koehn]

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Fixed. Added necessary splitting code in both Java and
Javascript marshalers. Test splits at the beginning, middle,
end, and sole positions in Strings.

[Brad Koehn]

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Code correctly handles a single CDATA terminator in the
source text, but needs to also handle multiple terminators
in sequence.