新增了一些DAO接口
The Model class and DAO interface had been completed.
Merge branch 'master' of https://github.com/BitRanger/C1_ParknShop

Conflicts:
	sql/onlineshop.sql
	sql/onlineshopEER.mwb
	src/com/bitranger/parknshop/model/PSItem.java
	src/com/bitranger/parknshop/model/PSTag.java
	src/com/bitranger/parknshop/model/PsCustomer.java
	src/com/bitranger/parknshop/model/PsItemInfo.java
	src/com/bitranger/parknshop/model/PsOrder.java
	src/com/bitranger/parknshop/util/package-info.java