- removed log4j dependency (never actually used)
- removed MongoContextFactory as recent testing has shown it to be unnecessary... NOTE: FEATURE_DYNAMIC_SCOPE may be valuable for multi-threaded applications but that is just a hunch
- added a mechanism to direct the output of JS print(..) calls to a specific implementation of the PrintHandler interface for the current MongoScope... default behavior if none set is to use Global.print() implementation (typically stdout)... this opens the door for sending print(..) output through a logging system such as log4j