Add optional streamOptions to playStream() functions (#663)

* Adding playStream options

Added optional volume and seek properties

* fixed code formatting

Edited my code styling to match with the rest of d.js

* Added Default Variable

* Added Documentation

Added documentation for the streamOptions parameter
Added a default value for seek in FFmpegConverterEngine
Removed redundantcy

* Fixed docs for voiceConnection

* Change _updateMember's notSame check from && to || (#665)

* Fixed git merge fail

* Built Docs. Again.........

* Hopefully finally fixed

src/client/voice/dispatcher/StreamDispatcher.js

@@ -18,7 +18,7 @@ nonce.fill(0);
  * @extends {EventEmitter}
  */
 class StreamDispatcher extends EventEmitter {
-  constructor(player, stream, sd) {
+  constructor(player, stream, sd, streamOptions) {
     super();
     this.player = player;
     this.stream = stream;
@@ -30,7 +30,7 @@ class StreamDispatcher extends EventEmitter {
     };
     this._startStreaming();
     this._triggered = false;
-    this._volume = 1;
+    this._volume = streamOptions.volume;
   }
 
   /**