update tips label of DEMO and update DEMO gif.

Author: SpecialCyCi

2.gif

@@ -25,7 +25,7 @@
         <TextView
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:text=" 1. Swipe right to open menu"
+                android:text=" 1. Swipe right/left to open menu"
                 android:id="@+id/textView" android:layout_gravity="center" android:clickable="false"
                 android:textColor="#ffacacac" android:textSize="17sp" android:padding="5dp"/>
         <Button