implement login function
implement server side service
Ready for test
Merge branch 'master' of https://github.com/haijunsu/QC

Conflicts:
	2014fall/cs715/projects/RMIProject/src/client/AuthClient.java
	2014fall/cs715/projects/RMIProject/src/entity/Schedule.java
	2014fall/cs715/projects/RMIProject/src/entity/User.java
	2014fall/cs715/projects/RMIProject/src/resources/auth.properties
	2014fall/cs715/projects/RMIProject/src/server/AuthEngine.java
	2014fall/cs715/projects/RMIProject/src/service/AuthService.java
	2014fall/cs715/projects/RMIProject/src/service/AuthServiceImpl.java
	2014fall/cs715/projects/RMIProject/src/utils/Configuration.java