Fixed typos in documentation.

   * XmlHandler::startElement method handles reading of the XML file and initializing the

   * member variables for the object. The class must also define a constructor that takes a

   * XmlStackedHandlerReader as a parameter (Note the IPCE signatures vary on this method).

   * The constructor pushes a it's own content handler (the XmlHandler class) on the reader

   * The constructor pushes it's own content handler (the XmlHandler class) on the reader

   * to allow parsing to continue with this object. Note the push of the content handler

   * does not return until the XML is parsed, specifically the push of the content handler

   * calls XmlHandler::startElement() for the handler just pushed.  If a contained object

   * is found while parsing the XML the constructor for the contained object that takes a

   * is found while parsing the XML, the constructor for the contained object that takes a

   * XmlStackedHandlerReader as a parameter is called.  This will result in the contained

   * object pushing it's content handler and parsing the relevant XML. When the constructor

   * returns XML parsing can continue for this object.

   * returns, XML parsing can continue for this object.

   *

   * *Potential issue*

   * There appears to be no support for cycles or joins in the object graph when serializing

   * To ensure backwards compatibility versioning is done per object. This keeps version

   * information for a class within a single source file with no need to know Project file

   * structure and where Project level file information is saved.  The version number

   * for an class should be incremented by 1 each time a when the XML for that object changes.

   * When reading old version XML files the class should choose a sensible default for the

   * for a class should be incremented by 1 each time the XML for that object changes.

   * When reading old version XML, files the class should choose a sensible default for the

   * missing XML elements and write out the XML in the newest format.

   *

   * This XML handler is designed to work with the XmlStackedHandlerReader. This XML handler class

   *     </xmlTag>

   *   </pre>

   *

   *   To start the processing of the XML an initial XML content handler is pushed onto the

   *   To start the processing of the XML, an initial XML content handler is pushed onto the

   *   stack of content handlers.  In the example above this initial content handler only

   *   processes elements associated with xmlTag1.  In IPCE the xmlTag1 elements will be the

   *   member variables associated with a class.  The xmlTag2 contains XML for an object