Feature Request: read_excel sheet_name argument
I would love to be able to only read in un-hidden sheets. this could be a new possible value that can be passed to the `sheet_name` argument.

alternatively, what would also solve my problem is some way to filter the columns (again, probably for `sheet_name`). ideally be able to use regex or string comparison to choose which sheets to read. 

also, what about being able to specify which sheets to be ignored?