trang compare.jsp, ajax lay san pham moi
chinh sua giao dien
Merge branch 'master' of github.com:khanhminh/CellPhoneShop

Conflicts:
	cellphoneshop/src/main/java/cellphoneshop/controller/HomeController.java
	cellphoneshop/src/main/java/cellphoneshop/dao/SanPhamDAOImpl.java