[PEPr] Changes in proposal for XML::Create_KML

Robert McLeod (http://pear.php.net/user/hamstar) has edited the proposal for XML::Create_KML. Change comment: Various fixes and changes as suggested from the comments on proposal. * The function to create the KML code now uses the SimpleXML class. * Function to create KML code is now in the magic __toString() method under the XML_KML_Create * Removed the save() method * Implemented constructers and destructers * Implemented one-class-per-file rule adding Main.php KML/Place.php and KML/Style.php * Changed class name KML to XML_KML_Create * Changed class name KMLPlace to XML_KML_Place * Changed class name KMLStyle to XML_KML_Style * Implemented set*() methods on XML_KML_Style and XML_KML_Place that validate input * Code now adheres to PHPCodeSniffer standards Please review the proposal: http://pear.php.net/pepr/pepr-proposal-show.php?id=616