parse excel from mac Number
add macExcelFile to test
gofmt
Merge branch 'pr-mac-number' of https://github.com/bronze1man/xlsx
Additional logic not required in getWorksheetFromSheet as we correctly read the mapping from the workbook.xml.rels file within the XLSX bundle.
Add docstring to TestMacExcel test function.
add test xlsx file
add test xlsx file
Merge pull request #22 from bronze1man/pr-mac-numbers-test

the missing mac's Numbers xlsx file
Fix capitalisation of "macNumbersTest.xlsx" in the code, in order to make tests pass.
Merge branch 'pr-wpsBlankLine' of https://github.com/bronze1man/xlsx into bronze1man-pr-wpsBlankLine
Modify readRowsFromSheet to handle series of rows and cells omitted from the
XML because they're blank.
add test case
fix test error message bug
Fix blank column handling to pass new test case.