NotImplementedError: formatting_info=True not yet implemented for older xls files

[akariv]

Overview

When opening certain excel files, this exception is thrown.
[Sample file](https://ams3.digitaloceanspaces.com/budgetkey-files/spending-reports/2018-3-משרד התרבות והספורט-לשכת הפרסום הממשלתית-2018-10-22-c457.xls)

Reason for exception is this line in xlrd:
https://github.com/python-excel/xlrd/blob/master/xlrd/xlsx.py#L799

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