Windows set up for MuseScore & Windows Media Player

[Isioviel]

environment.set('midiPath', os.path.join(os.environ["PROGRAMFILES(X86)"], r"Windows Media Player\wmplayer.exe"))
environment.set('musicxmlPath', os.path.join(os.environ["PROGRAMW6432"], r"MuseScore 3\bin\MuseScore3.exe"))

[geokala]

I've updated the master branch with some code to deal with this. Can you give it a try if you get a chance?

[geokala]

Also, do you think supporting documentation would need to mention that musescore will pop up some dialog boxes on first run?

(probably respond on #13 if you get a chance)