Add a restartTidal command

[sss-create]

I'd like to have an easy way to restart tidal when changes in the BootTidal.hs were made such as latency settings. It's annoying to quit the editor, ghci and restart everything manually. At least that is how I do this now.

I think of something as simple as a restartTidal function.

A first attempt to implement such a function were met with 'already assigned OSC port' errors.