Version 1.2.10 released

Add two new methods to the PreferencesHelper to get or put a map of preferences for a particular class type
Add a new ZipStreamHandlerFactory class allowing to use a zip protocol and also to use the NestableURLConnection since the last JDK updates
Add a new NestableURLConstructor class creating a nested url specification
Fix the the XMLNode class not setting the parent of a Node if this node is set as a child of a parent node
Improve the serialization of the XMLNodeUtilities class in the case of CDATA in nodes
Use docJGenerator 1.5.2 for the wiki