Add basic support for generating an AXI interface for the VHDL output <bountysource-plugin> --- Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/48158139-add-axi-interface-generator?utm_campaign=plugin&utm_content=tracker%2F36576838&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F36576838&utm_medium=issues&utm_source=github). </bountysource-plugin>