Supporting resource manager

[ptjuanramos]

Npoi.Mapper currently doesn't support ResourceManager when using the DisplayAttribute.

Consider the follow class:

public class RecordTest {
   [Display(ResourceType = typeof(LabelResource), Name = nameof(LabelResource.Name))]
   public Name { get; set; }

   [Display(ResourceType = typeof(LabelResource), Name = nameof(LabelResource.LastName))]
   public LastName { get; set; }
}

When generating a new file the produced columns names are "Name" and "LastName", which are actually the result of the operations of nameof(LabelResource.Name) and nameof(LabelResource.LastName). This raised up my suspicion that Npoi.Mapper don't support ResourceManager.

Note: I will proceed of implementing this feature if you guys agree.