halfway through implementing timestamps:

* still need to use the start position value stored in the PlayVideoActivity's Intent bundle, to set the VideoView using seekTo()
* need to test timestamp extraction regex, and possibly move it somewhere else
*need to find a better way to get the startPosition value to ActionBarHandler, which I thought used VideoInfo objects, but apparently doesn't
    * currently there is a small setStartPosition() method

app/src/main/java/org/schabi/newpipe/VideoInfo.java

@@ -50,6 +50,7 @@ public class VideoInfo {
     public VideoInfoItem nextVideo = null;
     public VideoInfoItem[] relatedVideos = null;
     public int videoAvailableStatus = VIDEO_AVAILABLE;
+    public int startPosition = 0;//in seconds
 
     private static final String TAG = VideoInfo.class.toString();