Create README.md

Author: dtrung98

README.md

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+# Spring Back Layout
+**A wrapper ViewGroup that provides an iOS Look-And-Feel Overscroll Effect**
+### Note
+This ViewGroup is from the decompiled MIUI Setting App
+
+### Screen shot
+
+<div align="center">
+  <table align="center" border="0" >
+  <tr>
+    <td> <img width="360"
+src="https://user-images.githubusercontent.com/33343210/82741450-1ca06280-9d7c-11ea-9986-ad2a83673e23.gif"/></td>
+  </tr>
+</table>
+  </div>
+</br>
+
+### Adding to project
+```
+implementation 'com.github.ldt-libs:SpringBackLayout:1.0'
+```
+
+### Usage
+Wrap any scrollable view in the SpringBackLayout, like RecyclerView, ListView or NestedScrollView.
+
+```
+<com.ldt.springback.view.SpringBackLayout
+    android:id="@+id/root"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:scrollOrientation="vertical"
+    tools:context=".MainActivity">
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+</com.ldt.springback.view.SpringBackLayout>
+```