ExcelDataReader/ExcelDataReader — pull request #34 by SteveLillis (2014-11-14 12:06:35+00:00)
Title: Added Visible State support

The key changes in this request are:
> Made the first sheet in the two Test_Excel_Dataset sheets HIDDEN, and the last sheet VERY HIDDEN
> Exposed the worksheet visibility as a string property in worksheet classes and as a string property on IExcelDataReader
> Corrected a mistake in XlsBiffBoundSheet that read Type byte as Visibility byte and vice versa