Make row validation optional, parse XLSX files, add worksheet column to Excel parser#1

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tylergannon wants to merge 2 commits intoactivewarehouse:masterfrom tylergannon:master

+44-15

Commits on May 19, 2013

Add ability to output worksheet name in Excel Parser
tylergannon
committed

Commits on Jun 1, 2013

make row validation an option, parse XLSX files, add worksheet column for excel parser.
tylergannon
committed