roles have been partially enforced on the supplier

john_doe is now a manger, and josh is a reciver
Merge branch 'master' of https://github.com/truly-auto/SENG403

Conflicts:
	src/main/resources/SQL/Tables.sql

Merging my branch with master.. i think
added functionality to log out button

easier to demo
Merge branch 'master' of https://github.com/truly-auto/SENG403

Conflicts:
	src/main/java/FoodLink/gui/SupermarketSys.java

syncing with master branch