WIKINDX API trunk

Create objects for commonly used classes. Theoretically, this should save time in loading classes using include() statements and, perhaps, memory by not having multiple instances of the same object. Many WIKINDX classes have busy __construct() methods (initializing arrays etc.). Using FACTORY ensures that this work is only done once each time the web server deals with a script -- subsequent class instantiations in the same server call return only the already constructed object.

e.g. To call the FACTORY SESSION object: $this->session = FACTORY_SESSION::getInstance();