Added wrapper for ProgressBarRenderer

addon/src/main/scala/vaadin/scala/renderers/ProgressBarRenderer.scala

@@ -0,0 +1,21 @@
+package vaadin.scala.renderers
+
+import com.vaadin.ui.renderers.{ ProgressBarRenderer => VProgressBarRenderer }
+import vaadin.scala.renderers.mixins.{ ProgressBarRendererMixin => Mixin }
+
+package mixins {
+  trait ProgressBarRendererMixin extends AbstractRendererMixin
+}
+
+object ProgressBarRenderer {
+
+  def apply(): ProgressBarRenderer = new ProgressBarRenderer
+
+}
+
+/**
+ * @see com.vaadin.ui.renderer.ProgressBarRenderer
+ * @author Henri Kerola / Vaadin
+ */
+class ProgressBarRenderer(override val p: VProgressBarRenderer with Mixin = new VProgressBarRenderer with Mixin)
+  extends AbstractRenderer[java.lang.Double](p)