proposal end ? + correction interfaces et models
correction ProposalManager
correction multiple, mais encore bugs !
Merge branch 'master' of https://github.com/sdefauw/CarPooling

Conflicts:
	carpooling/app/controllers/ProposalManager.java
DB OK: /!\ IL FAUT RECREER TT LA DB
Merge branch 'gui' of https://github.com/sdefauw/CarPooling
GUI: un peu de tt