Some patches - Githubissues

Hi!

Did some patches again:

I found it a bit annoying the tape was rewound at every reset (I have some old tapes digitized in one big .tap file), so prevent it at warm reset.
I saw the Turbosound in MiSTer, so I thought it would be a good (and easy) backport (dual AY only).
And some updates and typo fixes to the README (destiny->density, it looked silly, and was my fault)

Hope you accept them.

sorgelig / ZX_Spectrum-128K_MIST