+ poprawa niektorych metod, testing testing Panowie ;)
Merge branch 'master' of github.com:Vistritium/Supermarket

Conflicts:
	backend/api/src/test/java/FinanceManagementTest.java
- upade storage & webapp
Merge branch 'master' of github.com:Vistritium/Supermarket

Conflicts:
	backend/api/src/main/java/backend/api/FinanceManagement.java