Paper status distribution partially done.
Merge branch 'master' of https://github.com/patr7/conf-reg-sys
Updated diagrams. Added billing-related information to registrant and deleted the amountPaid attribute (updated dependent code to some extent)
Merge branch 'master' of https://github.com/patr7/conf-reg-sys

Conflicts:
	src/controllers/PaymentController.java
	src/data/access/DataAccessFacade.java
	src/data/access/RegistrantDA.java