Minor re-org
PDIO-260 Fixed itypes parameter typo causing itypes setting not working
PDIO-259 Add real-time item start and end time support
PDIO-259 Real-time item start and end time support for ItemSim engine
PDIO-267 Fixed incorrect score ranking in mahout model con
Update copyright year to 2014
PDIO-10 PDIO-266 Returned Option[T] data for optional mongo field (items endtime and u2i v fields)
PDIO-266 Added simple example reading optional endtime from mongo
PDIO-270 Remove printing out of every single write from Cascading to MongoDB
PDIO-269 Add support of engine level training scheduling
PDIO-269 Training schedule frontend