XML_Tree bug fix

Gday, I have noticed (and fixed) a couple issues in the XML_Tree : XML/Tree.php - see Bug #19667 on bugs.php.net (http://bugs.php.net/bug.php?id=19667) if the char data of a node was '0' (zero) the data wouldn't be set. The solution was a simple change in the cdataHandler() fn - getTreeFromString() didn't return the root node by reference, which getTreeFromFile() does. XML/Tree/Node.php - Attribute values weren't having their single or double quotes escaped - The content of the nodes wheren't having the <, >, ', " (left and right angle brackets, single and double quotes) escaped. Another thing that I changed was the moving of the _xml_entities() call from the setContent() to being called in get(), this is because by escaping the contents in setContent() - which get's called when parsing any xml as well as when a user is creating a tree in the code - it leave's the user with the task of unescaping the content before they can use it outside the tree. If this doesn't make sense I can provide an example. Anyway the diff's for the fixes are available at http://beta.squiz.net/~brobertson/public/xml_tree/ with the full version of the files being under the new/ dir tell me what you think, Blair