adding a debug for #1364
added ability to merge corpora to debug #1364 and can be used for #963
fixes #1364 adding checked to the list of things that spreadsheet puts on its datum
added workaround so that #1364 doesnt break the LaTeX export
upped to version v1.93.4 for release
Merge pull request #1365 from cesine/master

Release v1.93.3 and 1.93.4