fix the singleton and factory methods for a). php 4.0.6 (where include_once might return false) b). to use references and not copy so many objects
fix the singleton and factory methods for
a). php 4.0.6 (where include_once might return false)
b). to use references and not copy so many objects


marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core,marcosptf/pear-core