Added Ribbon.js

src/objects/Ribbon.js

+/**
+ * @author alteredq / http://alteredqualia.com/
+ */
+
+THREE.Ribbon = function ( geometry, materials ) {
+
+	THREE.Object3D.call( this );
+
+	this.geometry = geometry;
+	this.materials = materials instanceof Array ? materials : [ materials ];
+
+	this.flipSided = false;
+	this.doubleSided = false;
+	
+};
+
+THREE.Ribbon.prototype = new THREE.Object3D();
+THREE.Ribbon.prototype.constructor = THREE.Ribbon;