Extract reading files from the zip for the Xlsx Reader#2083

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MarkBaker wants to merge 2 commits intomasterfrom Xlsx-Reader-Refactor-Zip-Reader

Commits on May 10, 2021

Extract reading files from the zip for the Xlsx Reader; refactoring preparatory to using the ZipReader class injected into other classes
MarkBaker
committed
Move additional methods to the new Xlsx ZipFileReader class
MarkBaker
committed