Criação da janela de criação de comprovantes e mudanças nas janelas de locação.
Merge branch 'master' of https://github.com/thiagomartins89/EngSoft-dos-brothers

Conflicts:
	OldButGold/src/GUI/WindowClientCarRent.java
	OldButGold/src/GUI/WindowClientVehicleRent.java
	OldButGold/src/GUI/WindowEmployeeCarRent.java
	OldButGold/src/GUI/WindowEmployeeMenu.java
	OldButGold/src/GUI/WindowEmployeeVehicleRent.java
	OldButGold/src/GUI/WindowVehicleDetails.java
	OldButGold/src/control/CtrlClientVehicleRent.java
	OldButGold/src/control/CtrlEmployeeVehicleRent.java
	OldButGold/src/control/MainEmployee.java