Matrix Division on the 28C/S (and later)

[Thomas Okken]

I implemented the real-complex and complex-complex cases, and moved all three cases to separate functions, so they can be easily reused later in other functions. Those other functions have yet to be done, but the improved DOT is now complete.

I uploaded test versions for Android, Windows, Mac, and Linux to https://thomasokken.com/free42/download/test/
and the source code is in the master branch in GitHub.
For the Windows build, I switched from Visual C++ 2008 to 2019, so I was able to build the Binary version again.