Skin System

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Version 5:
Added optional <NoteLineColor> to be able to colour the note lines (Fallback to gray with 0.2 Alpha if not set)

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Version 4:
All Colors in <Colors> (Playercolors and ColorSchemes)

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Version 3:

Added videos:
<IntroIn>
<IntroMid>
<IntroOut>

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Version 2:

Changed:
<ColorSheme>
to
<ColorScheme>
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