Add ToonMap support to MaterialLoader

src/loaders/MaterialLoader.js

@@ -140,6 +140,9 @@ Object.assign( MaterialLoader.prototype, {
 		if ( json.aoMap !== undefined ) material.aoMap = getTexture( json.aoMap );
 		if ( json.aoMapIntensity !== undefined ) material.aoMapIntensity = json.aoMapIntensity;
 
+		if ( json.toonMap !== undefined ) material.toonMap = getTexture( json.toonMap );
+		if ( json.toonMapDirectionY !== undefined ) material.toonMapDirectionY = json.toonMapDirectionY;
+
 		// MultiMaterial
 
 		if ( json.materials !== undefined ) {