Grade menos OO, mais DB
Imports não utilizados
Imports não utilizados (2)
Merge branch 'grade-db'

Conflicts:
	app/controllers/Application.java
	app/controllers/CadastroUsuario.java
	app/controllers/Carregador.java
	app/controllers/Sistema.java
	app/model/Plano.java
	conf/evolutions/default/1.sql
	test/model/UsuariosTest.java
Revert "Merge branch 'grade-db'"

This reverts commit 27eafcc1808e1511fc8f80c3f86eb795ef92c134, reversing
changes made to 95f3160d17d3049e31ee9e52e6924269c5e71437.