PDIO-300. Feature based itemrec, batch mode.
PDIO-300. Add model data keyval store for realtime engine settings.
PDIO-300 Config return metadata-keyval
PDIO-300. Fix build for feature based.
Adding immediate changes.
Merge branch 'fb' of https://github.com/PredictionIO/PredictionIO into fb
PDIO-300. Fix mess after wrong merge.
PDIO-302. Items add filter by time.
PDIO-300. Realtime output for feature-based itemrec.
Merge branch 'fb' into develop

PDIO-300

Conflicts:
	output/src/main/scala/io/prediction/output/itemrec/ItemRecAlgoOutput.scala
	output/src/main/scala/io/prediction/output/itemrec/ItemRecCFAlgoBatchOutput.scala
	output/src/main/scala/io/prediction/output/itemrec/ItemRecCFAlgoOutput.scala
Merge branch 'develop' of https://github.com/PredictionIO/PredictionIO into develop