add extends Effect explanation

Author: KevinGrajeda

src/panner3d.js

@@ -12,8 +12,13 @@ import Effect from './effect';
  * Audio Context Listener</a>, which can be accessed
  * by <code>p5.soundOut.audiocontext.listener</code>
  *
+ *  This class extends <a href = "/reference/#/p5.Effect">p5.Effect</a>.
+ *  Methods <a href = "/reference/#/p5.Effect/amp">amp()</a>, <a href = "/reference/#/p5.Effect/chain">chain()</a>,
+ *  <a href = "/reference/#/p5.Effect/drywet">drywet()</a>, <a href = "/reference/#/p5.Effect/connect">connect()</a>, and
+ *  <a href = "/reference/#/p5.Effect/disconnect">disconnect()</a> are available.
  *
  * @class p5.Panner3D
+ * @extends p5.Effect
  * @constructor
  */
 

src/reverb.js

@@ -212,6 +212,11 @@ class Reverb extends Effect {
  *  <p>Use the method <code>createConvolution(path)</code> to instantiate a
  *  p5.Convolver with a path to your impulse response audio file.</p>
  *
+ *  This class extends <a href = "/reference/#/p5.Effect">p5.Effect</a>.
+ *  Methods <a href = "/reference/#/p5.Effect/amp">amp()</a>, <a href = "/reference/#/p5.Effect/chain">chain()</a>,
+ *  <a href = "/reference/#/p5.Effect/drywet">drywet()</a>, <a href = "/reference/#/p5.Effect/connect">connect()</a>, and
+ *  <a href = "/reference/#/p5.Effect/disconnect">disconnect()</a> are available.
+ *
  *  @class p5.Convolver
  *  @extends p5.Effect
  *  @constructor