1. Add four jars for excel suport:
	* poi-3.10.1-20140818.jar
	* poi-ooxml-3.10.1-20140818.jar
	* poi-ooxml-schemas-3.10.1-20140818.jar
	* xmlbeans-2.6.0.jar
2. Optimize entity class and related test codes
3. Add data-transfer.sql file