Improve xlsx support

libmat2/office.py

@@ -90,6 +90,9 @@ class MSOfficeParser(ZipParser):
             r'^(?:word|ppt|xl)/_rels/document\.xml\.rels$',
             r'^(?:word|ppt|xl)/_rels/footer[0-9]*\.xml\.rels$',
             r'^(?:word|ppt|xl)/_rels/header[0-9]*\.xml\.rels$',
+            r'^(?:word|ppt|xl)/styles.xml$',
+            r'^xl//workbook.xml$',
+            r'^xl//worksheets/sheet[0-9]+.xml$',
             r'^ppt/slideLayouts/_rels/slideLayout[0-9]+\.xml\.rels$',
             r'^ppt/slideLayouts/slideLayout[0-9]+\.xml$',
             r'^(?:word|ppt|xl)/tableStyles\.xml$',