* Add support for table cells spanning multiple columns.
1.0.0
* Remove deprecated convertUnderline option.
* Officially support ID prefixes.
* Generated IDs no longer insert a hyphen after the ID prefix.
* The default ID prefix is now the empty string rather than a random number followed by a hyphen.
* Rename mammoth.images.inline to mammoth.images.imgElement to better reflect its behaviour.
0.3.33
* Improve collapsing of elements when there are empty elements.
0.3.32
* Allow bold and italic style mappings to be configured.
0.3.31
* Handle references to missing styles when reading documents.
0.3.30
* Improve support for lists made in LibreOffice. Specifically, this changes the default style mapping for paragraphs with a style of "Normal" to have the lowest precedence.
* Replace nomnom with argparse for CLI argument parsing. Usage should be the same, but unknown arguments will now cause an exit with failure rather than being ignored.