Also Merge styles.xml in OpenOffice documents

[filkaris]

In an .odt document, you can add Text Frame fields, so the text is more organized and appears exactly where you want it.

This is especially useful when working with images in the same document, for example printing invoices.
See the attached file for an example
text_frame_example.odt.zip

The issue here, is that the text inside the Text Frames does not appear inside content.xml
Instead, it is stored in styles.xml

This means that the merging has to happen twice, once for each file.

This commit is more of a proof of concept than a complete solution. This setup works with the Text Frames mentioned above.

We just thought this could be addressed in a more sophisticated way, and not 'patchy' like this.

[nathangray]

I have yet to test this, but it looks like the way to do it. What were you thinking for "a more sophisticated way"?

[ralfbecker]

@filkaris @asig2016 Can you please answer @nathangray question, so we can decide to merge this or wait ...