20: Open DBF files 

Task-Url: https://github.com/lomagno2003/codemapper/issues/issue/20
24: Refactor the MapperFactory to create Mappers from Files instead of
HSSFWorkbooks 

Task-Url: https://github.com/lomagno2003/codemapper/issues/issue/24
25: Create DBF facade 

Task-Url: https://github.com/lomagno2003/codemapper/issues/issue/25
25: Create DBF facade 

Task-Url: https://github.com/lomagno2003/codemapper/issues/issue/25