All uncommented tests passing.

I just uncommented them without typing anything.
Tests with workbook already open now passing.

They were needing modules that were not here due to the update of the
architecture (no more open workbook to export them from). Now there is a
little function to copy them in the directory where they're needed.
Part of the XLA file format bug fixed for sure.

- Now the file format is right, test is passing.
- We still don't know if the file is openable by Excel 2003.