edit README

Author: benjaminwan

README.md

@@ -222,4 +222,13 @@ EpoxyMenuTouchHelper.initDragging(epoxyController)
                     objectAnimator?.cancel()
                 }
             })
-```
+```
+
+#### Other
+MenuItemTouchHelper directly copy-paste the code from ItemTouchHelper.
+
+When using drag-and-drop in RecyclerView, Dragging the 1st item causes fast scrolling.
+
+It leads to the fact that the 1st item can't be placed, for instance, to the 2nd position.
+
+It is recommended to replace the first item with a non-draggable view.

README_zh.md

@@ -223,4 +223,14 @@ EpoxyMenuTouchHelper.initDragging(epoxyController)
                     objectAnimator?.cancel()
                 }
             })
-```
+```
+
+#### 其它
+MenuItemTouchHelper直接复制粘贴了ItemTouchHelper的代码。
+
+在RecyclerView中使用拖拽排序时，拖拽第一个item向下移动会导致快速向下滚动的问题。
+
+导致难以让第一个item移到第二的位置。
+
+所以建议在第一个item的位置以一个不可拖拽的view来代替。
+