Add haptic feedback

Change-Id: I15d723f73c0b0bb4a40645d1c3f4c1c616f36998
diff --git a/gui/slider.cpp b/gui/slider.cpp
index b46d156..3908b82 100644
--- a/gui/slider.cpp
+++ b/gui/slider.cpp
@@ -15,6 +15,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <stdlib.h>
+#include "../data.hpp"
 
 #include <string>
 
@@ -153,6 +154,7 @@
 		break;
 
 	case TOUCH_RELEASE:
+               DataManager::Vibrate("tw_button_vibrate");
 		if (!dragging)
 			return 0;