Feature requests for parity with upstream projects

Created by: Shoegzer

First, fantastic job with this core! With all the nice improvements and changes lately, this has become my default Amiga emulator replacing upstream fs-uae.

Thought I would request a few features that would hopefully help to bring the core up to parity with upstream projects. For easier tracking I thought I would include them together rather than as individual issue requests, though I can break them out if need be:

1. Support for creating HDF hard drive images. fs-uae permits this via the fs-uae-launcher main menu. Would be great if this core could do the same via the RA UI.

2. Support for expansion boards. Again, fs-uae supports multiple expansion boards for accelerator (blizzard/cyberstorm), scsi, graphics (UAEGFX, Picasso II Zorro etc.), sound (toccata) and network (a2065) cards. Video Toaster support would be a nice addition as well, even if not supported by fs-uae.

3. Support for saving content to floppies. Haven't been able to confirm that this core doesn't permit saving but i haven't seen or read anywhere that it does either (and there's no core-specific wiki yet). Ideally content would be saved via a change or diff file rather than writing over the original floppy itself, though the option could be available via toggle.

4. Internal inclusion of capsimg. Note that fs-uae doesn't do this either but thought I would ask in case it's possible, in the interest of gaining some usability.