Support elastic tabstops [$5] #479
Description
It would be good for us to be able to support elastic tabstops as an alternative to space- or tab-indentation. See here and here.
--- There is a **[$5 open bounty](https://www.bountysource.com/issues/7427919-support-elastic-tabstops?utm_campaign=plugin&utm_content=tracker%2F282001&utm_medium=issues&utm_source=github)** on this issue. Add to the bounty at [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F282001&utm_medium=issues&utm_source=github).