增加测试代码 完成账户管理和收款单测试
Merge branch 'master' of
ssh://git@github.com/minusone13/InvoicingSystem.git

Conflicts:
	AlertBillPO.txt
	ReceiptPO.txt
Merge branch 'master' of
ssh://git@github.com/minusone13/InvoicingSystem.git