Choonster:
	- Update TOC to 50200
	- Change PopulateMusic_Windows.js to compare file types instead of file
	extensions (which are only included in the name when they're shown in
	Windows explorer).
	-- Move file type checks into the isAudioFile function to make the logic
	easier to change in future.
	- Replace all == with === in PM_Windows.js
	- Add a missing backslash in the main comment of
	ScriptParts\music_part0.lua and music.lua
