Log Message:
Update p5-Spreadsheet-XLSX from version 0.10 to version 0.12

Upstream changes:
0.12  Tue Oct  6 10:04:37 MSD 2009
	- sheets are now detected by relations (xl/_rels/workbook.xml.rels), not \ 
numbers (RT #50236, thanks Pat Mariani)

0.11  Mon Oct  5 19:03:46 MSD 2009
	- sheets numbering fixed (RT #50211, thanks endacoe)