criado classe mod11
Merge branch 'master' of github.com:lucas-silva/mvczin
colocado a lógica na classe mod11
Merge branch 'master' of github.com:lucas-silva/mvczin

Conflicts:
	Mvczin.Web/Mvc/Validation/CnpjAttribute.cs
	Mvczin.Web/Mvc/Validation/CpfAttribute.cs
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