Explore bsdiff or similar methods for creating and applying delta updates via our own installer method

• bsdiff: https://github.com/mendsley/bsdiff
• bsdiff for c#: https://github.com/LogosBible/bsdiff.net

I think creating the delta files wouldn't be too hard, maybe, if we can just basically diff old version with new version and zip up the output or something. Doing the actual patch could take some work, though, as it might mean shipping a new binary with end products (or downloading a 2nd one?) to do the patching (since I presume an executable wouldn't be able to patch itself...).

This issue is more here just for thinking out loud than actually implementing it. It would be "really cool" to do and see, but I don't know if it will ever get done. Maybe someday some Big Company will come by and want this and sponsor an engineer to do it. :)

No source files or tests are named. Review the linked bsdiff and bsdiff.net projects, then inspect NetSparkle’s installer method and update flow to determine how delta creation and application could work; done would mean a decided, feasible approach for both operations.