created InsufficientBalanceException
several design fixes
code review
Merge branch 'master' of https://github.com/PauloGandraSousa/MyGitTest

Conflicts:
	eapli.expensemanager/src/eapli/expensemanager/controllers/RegisterExpenseController.java
	eapli.expensemanager/src/eapli/expensemanager/model/AlertLimit.java