Add Row/Col position

[Danm72]

Hey there - it would be really nice to be able to add a row to the top or bottom, or add a column at a particular point.

At this time if we want to add a new row we need to add it to the bottom and then copy all content to the row below it - which isn't the best.

Same issue for cols.

[rdunk]

Agreed, would happily accept a PR for this feature.

[Danm72]

@rdunk #18

[rdunk]

Thanks! Merged and published as 2.3.0.