xls-report.py: don't eat all errors when reading sheet.conf
xls-report.py: added an option to include data from unrecognized XMLs
xls-report.py: made most columns a little wider
xls-report.py: write tests in sorted order
xls-report.py: make behaviour more intelligent in case of repeated results
Merge pull request #1091 from SpecLad:xls-updates