add missing docs

src/PostProcess/babylon.depthOfFieldEffect.ts

@@ -1,7 +1,19 @@
 module BABYLON {
+    /**
+     * Specifies the level of max blur that should be applied when using the depth of field effect
+     */
     export enum DepthOfFieldEffectBlurLevel {
+        /**
+         * Subtle blur
+         */
         Low,
+        /**
+         * Medium blur
+         */
         Medium,
+        /**
+         * Large blur
+         */
         High
     };
     /**