docs(blur, config): api clean up

ionic/components/blur/blur.ts

@@ -2,9 +2,18 @@ import {Directive, Renderer, ElementRef} from 'angular2/core';
 
 
 /**
+ * @name Blur
+ * @description
  * The blur attribute applies the CSS blur attribute to an element. If the CSS attribute is not supported,
  * it will fall back to applying a semi-transparent background color to the element.
  *
+ * @usage
+ * ```html
+ * <ion-card blur>
+ *    This card will blur the content behind it.
+ * </ion-card>
+ * ```
+ *
  * @demo /docs/v2/demos/blur/
  */
 @Directive({