I was looking for something like this a few weeks ago. I do think that documentation is always nice though, so maybe you should reconsider that.

Also the option to give an array of objects would be nice, so something like this:

var body = [ {id: "#1", name: "Harry"}, {id: "#2", name: "Sally"} ]

new WordTable(body);

would result in the object keys being used as headers... Just a suggestion :)

Simple solution and clear code