Docxcompose

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- Add console script command to compose two or more word files.
[deiferni]

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- Fix error in mapping of num_ids introduced in 1.0.0.a7.
[buchi]

- Do not fail when numbering zero is referenced.
[deiferni]

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- Only attempt to set the nsid when it is available.
[deiferni]

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- Fix handling of images in WordprocessingGroups (<wpg:wpg>).
[buchi]

- Fix handling of shapes in shape groups (<v:group>).
[buchi]

- Fix handling of numberings, avoid inserting multiple numbering properties.
[buchi]

- Fix renumbering of bookmarks.
[buchi]

- Renumber ids of drawing object properties (<wp:docPr>).
[buchi]

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- Do not restart numbering of bullets.
[buchi]

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- Renumber bookmarks to avoid duplicate ids.
[buchi]

- Add support for shapes.
[buchi]