Added getter for tracks.

http://www.esotericsoftware.com/forum/viewtopic.php?f=7&t=1982

spine-csharp/src/AnimationState.cs

@@ -40,6 +40,9 @@ namespace Spine {
 		public AnimationStateData Data { get { return data; } }
 		public float TimeScale { get { return timeScale; } set { timeScale = value; } }
 
+		/// <summary>The list of tracks that have animations, which may contain nulls.</summary>
+		public List<TrackEntry> Tracks { get { return tracks; } }
+
 		public event EventHandler<StartEndArgs> Start;
 		public event EventHandler<StartEndArgs> End;
 		public event EventHandler<EventTriggeredArgs> Event;

spine-libgdx/src/com/esotericsoftware/spine/AnimationState.java

@@ -276,6 +276,11 @@ public class AnimationState {
 		return data;
 	}
 
+	/** Returns the list of tracks that have animations, which may contain nulls. */
+	public Array<TrackEntry> getTracks () {
+		return tracks;
+	}
+
 	public String toString () {
 		StringBuilder buffer = new StringBuilder(64);
 		for (int i = 0, n = tracks.size; i < n; i++) {