Implement UI for track skipping.

src/ui/PlayerInterface.h

@@ -50,6 +50,7 @@ public:
     Wt::WPushButton* playpause;
     Wt::WContainerWidget* skipControls;
     Wt::WPushButton* skipRequest;
+    Wt::WPushButton* skipDeny;
     
     bool isPaused = false;
     //TODO:put in controls for requesting/admin skip and adding users as admin.
@@ -60,8 +61,13 @@ public:
     
     void playpauseClicked();
     void playpauseUpdated();
+    void skipRequestClicked();
+    void skipDenyClicked();
     void updateDetailsFromServer(AudioTrack track);
     void updateProgressFromTimer();
+    void updateSkipRequestedFromServer();
+    void updateSkipDeniedFromServer();
+    void updateVotingEnded();
 };
 
 #endif // PLAYERINTERFACE_H