GetSummaries_00 Example Creation

* Checking in to better compare differences. Not *quite* done.
Example content changes.

* Instead of "", using NULL for fields with no data.
* Using SteamDocs::htmlText() for all HTML fields.
XMLSerializer::elementValue()

* XMLSerializer::elementValue() For better case handling for elements
with and without values.
* Converting most of XMLSerializer::createElement() to use
elementValue().
* Removed commented and other debug messages.
Process Examples & using new XML parser
Finished XMLSerializer cleanup