registration + service layer securing
registration
Merge branch 'master' of https://github.com/halafi/pa165-airport-manager

Conflicts:
	AirportManager/AirportManager-web/src/main/webapp/WEB-INF/application-security.xml
	AirportManager/AirportManager-web/src/main/webapp/WEB-INF/web.xml
	AirportManager/AirportManager-web/src/main/webapp/adminmenu.jsp
	AirportManager/AirportManager-web/src/main/webapp/layout.jsp