Add {PartName}NoteColorType and {PartName}NoteColorCount NoteSkin metric.

This patch adds 2 metrics for NoteSkin.

* {PartName}NoteColorType will take Denominator or Progress.
    * Denominator is classic style, colored by NoteType.
    * Progress simulates DDR's Rainbow noteskin.
* {PartName}NoteColorCount is Number of Note Color
    * You can reduce image size by reducing this value.