Corrige maiusculas/minusculas
fixes infufg/SADE#60

Inserindo o modelo de domínio o qual os requisitos foram baseados, sendo ele a ideia inicial do problema.
Merge pull request #77 from eurismarpires/master

Corrige maiusculas/minusculas
Merge branch 'master' of git://github.com/luizhenriquees/SADE into luizhenriquees-master
Merge branch 'luizhenriquees-master'
Merge pull request #78 from blessedguy/master

fixes infufg/SADE#60
fixes infufg/sade#68
Merge pull request #79 from viniciusmaboni/master

fixes infufg/sade#68