added method readCalendar
removed duplicate code by using ListWidget.java
added use case list incomes
added missing files Descriptable.java and BaseType.java for ListWidget to work
use case "register payment method"
use case "list payment methods"
code review
added a few more design questions to Notes.txt
Merge branch 'master' of https://github.com/PauloGandraSousa/MyGitTest

Conflicts:
	Notes.txt