Add default implementation for 'ended' property

Sources/Player.swift

@@ -80,6 +80,12 @@ public enum PlayerError: Int {
     func pause()
 }
 
+public extension Player {
+    var ended: Bool {
+        return self.time >= self.duration
+    }
+}
+
 // MARK: Identity Protocols
 
 /// A player that adopts the ProvidesView protocol is capable of providing a view to be added to a view hierarchy.

Sources/RegularPlayer.swift

@@ -119,10 +119,6 @@ extension AVMediaSelectionOption: TextTrackMetadata {
         return self.player.rate > 0
     }
     
-    public var ended: Bool {
-        return self.time >= self.duration
-    }
-    
     public var error: NSError? {
         return self.player.errorForPlayerOrItem
     }