Support to read and write unsupported data for XLSX

This will let users read a file that contains data that are not properly
supported and write them back to a new file untouched.

- load workbookProtection attributes
- save loaded pageSetup[r:id]
- save loaded sheet's AlternateContent
- save loaded unparsed VmlDrawings
- save loaded drawing files `rId`
- save loaded draw's AlternateContent
- save loaded control properties
- save loaded printer settings
- save loaded unparsed override content types (for ctrlProp, ...)

Closes #435
This commit is contained in:
Maxim Bulygin
2018-05-12 11:47:46 +09:00
committed by Adrien Crivelli
parent 064076ac6d
commit 83c759e951
10 changed files with 475 additions and 46 deletions
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