poi bug 54206 - Ensure that shared formuals are updated when shifting rows in a spreadsheet
poi Bugs 54228,53672 - Fixed XSSF to read cells with missing R attribute
poi:
53966 - IfError support (from Analysis Toolpak)
54402 - IfError handling of indirect references
poi: 53810 - NPOIFS fix for 0 not -1 padded partially used XBATs
Merge pull request #17 from antony-liu/master

port from poi