ObjectLoader: Parse data.rotation.

src/loaders/ObjectLoader.js

@@ -496,6 +496,8 @@ Object.assign( ObjectLoader.prototype, {
 
 				if ( data.offset !== undefined ) texture.offset.fromArray( data.offset );
 				if ( data.repeat !== undefined ) texture.repeat.fromArray( data.repeat );
+				if ( data.rotation !== undefined ) texture.rotation = data.rotation;
+
 				if ( data.wrap !== undefined ) {
 
 					texture.wrapS = parseConstant( data.wrap[ 0 ], TEXTURE_WRAPPING );