security changes
Merge branch 'master' of https://github.com/teamzz/RASUS.LectureProject

Conflicts:
	RASUSLab/src/main/java/hr/fer/ztel/service/CustomUserDetailsService.java
	RASUSLab/src/main/webapp/WEB-INF/spring/appServlet/spring-security.xml
	RASUSLab/src/main/webapp/WEB-INF/views/Quizes.jsp