文件夹调整，增加online nearline offline三个源码文件夹
Merge https://github.com/iCITY/SmartEngine

Conflicts:
	smartengine/src/offline/cn/wxcs/smartengine/evaluator/SmartEngineEvaluator.java
	smartengine/src/offline/cn/wxcs/smartengine/recommender/BaseRecommender.java
	smartengine/src/offline/cn/wxcs/smartengine/recommender/ItemBasedRecommender.java
	smartengine/src/offline/cn/wxcs/smartengine/recommender/package-info.java