Added GPL importer, new palette classes for clarification

Scripts/Palette/PaletteColor.gd

@@ -0,0 +1,42 @@
+extends Reference
+
+class_name PaletteColor
+func get_class(): return "PaletteColor"
+func is_class(name): return name == "PaletteColor" or .is_class(name)
+
+var color : Color = Color.black setget _set_color
+var data : String = "" setget _set_data
+var name : String = "no name"
+
+func _init(new_color : Color = Color.black, new_name : String = "no name"):
+	self.color = new_color
+	self.name = new_name
+
+func _set_color(new_value : Color) -> void:
+	color = new_value
+	data = color.to_html(true)
+
+func _set_data(new_value : String) -> void:
+	data = new_value
+	color = Color(data)
+
+func toDict() -> Dictionary:
+	var result = {
+			"data" : data,
+			"name" : name
+		}
+	return result
+
+func fromDict(input_dict : Dictionary) -> PaletteColor:
+	var result = get_script().new()
+	
+	result.data = input_dict.data
+	result.name = input_dict.name
+	
+	return result
+
+func duplicate() -> PaletteColor:
+	var copy : PaletteColor = get_script().new()
+	copy.data = data
+	copy.name = name
+	return copy