Add Noteskins

Added:
- Cel (classic)
- Metal (classic)
- Cyber (LightningXCE's)
- Enchantment
- Peter's Note
- Peter's Rainbow
- Peter's Vivid

Removed:
- All stock noteskins besides default

NoteSkins/dance/Metal/Down Tap Note.lua

@@ -0,0 +1,7 @@
+local t = Def.Model {
+	Meshes=NOTESKIN:GetPath('_down','tap note model');
+	Materials=NOTESKIN:GetPath('_down','tap note model');
+	Bones=NOTESKIN:GetPath('_down','tap note model');
+};
+
+return t;