added assets & updated readme

Author: DaniAkash

README.md

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+<h1 align="center">
+🧱 React Native Masonry ScrollView
+</h1>
+
+<div align="center">
+
+Simple easy to use Masonry ScrollView for React Native that extends the original ScrollView ✨
+
+[![Version][version-badge]][package]
+[![Downloads][downloads-badge]][npmtrends]
+
+<!-- [![Build Status][build-badge]][build]
+[![Code Coverage][coverage-badge]][coverage] -->
+
+[![Star on GitHub][github-star-badge]][github-star]
+[![Watch on GitHub][github-watch-badge]][github-watch]
+[![Twitter Follow][twitter-badge]][twitter]
+
+</div>
+
+<p align="center" >
+  <kbd>
+    <img src="./assets/vertical.gif" title="Vertical Masonry" float="left">
+  </kbd>
+  <kbd>
+    <img src="./assets/horizontal.gif" title="Horizontal Masonry" float="left">
+  </kbd>
+  <br>
+  <em>From the Example App</em>
+</p>
+
+## Installation
+
+```sh
+yarn add react-native-masonry-scrollview
+
+# or
+
+npm i react-native-masonry-scrollview
+```
+
+## Usage
+
+The Masonry ScrollView splits the content of the `ScrollView` into multiple columns or rows (depending on horizontal or vertical scroll) and renders the items into the individual column's `View` component. This component is built to extend the existing `ScrollView` component hence all the properties of the `ScrollView` will work with it and it can render any component supplied to it as children.
+
+```jsx
+import React from "react";
+import { View, StyleSheet } from "react-native";
+import RNMasonryScroll from "react-native-masonry-scrollview";
+
+const Box = () => <View style={styles.box} />;
+
+const App = () => (
+  <RNMasonryScroll>
+    {/**
+     * Masonry ScrollView only expects children as a list
+     */}
+    {[
+      <Box key={0} />,
+      <Box key={1} />,
+      <Box key={2} />,
+      <Box key={3} />,
+      <Box key={4} />,
+      <Box key={5} />
+    ]}
+  </RNMasonryScroll>
+);
+
+const styles = StyleSheet.create({
+  box: {
+    height: 50,
+    width: 50,
+    backgroundColor: "red",
+    margin: 16
+  }
+});
+
+export default App;
+```
+
+## Advanced Usage
+
+Refer the example expo app in `RNMasonryExample/` directory of this repo 👍
+
+## Properties
+
+### `children: ReactNode[]`
+
+Children of the Masonry ScrollView component should always be an array of React Nodes.
+
+---
+
+### `columns?: number`
+
+Number of columns to split the Masonry
+
+---
+
+### `columnStyle?: StyleProp<ViewStyle>`
+
+Style applied to the `View` component that is wrapping your components inside the Masonry ScrollView.
+
+---
+
+### `oddColumnStyle?: StyleProp<ViewStyle>`
+
+Style applied only to the n-th odd columns of the Masonry ScrollView. If you have 3 columns, this style will be applied to columns 1 & 3.
+
+---
+
+### `evenColumnStyle?: StyleProp<ViewStyle>`
+
+Style applied only to the n-th even columns of the Masonry ScrollView. If you have 3 columns, this style will be applied to column 2.
+
+---
+
+### `horizontal?: boolean`
+
+Control if the masonry is horizontal or vertical
+
+---
+
+### ScrollViewProps
+
+All the existing ScrollView Props are supported by this component since it simply extends the actual ScrollView.
+
+---
+
+## Example App
+
+The example app is built with expo, you can run the app following the official [expo docs](https://expo.io/learn).
+
+## Licenses
+
+MIT © [DaniAkash][twitter]
+
+<!-- [build-badge]:
+[build]:
+[coverage-badge]:
+[coverage]:  -->
+
+[downloads-badge]: https://img.shields.io/npm/dm/react-native-masonry-scrollview.svg?style=flat-square
+[npmtrends]: http://www.npmtrends.com/react-native-masonry-scrollview
+[package]: https://www.npmjs.com/package/react-native-masonry-scrollview
+[version-badge]: https://img.shields.io/npm/v/react-native-masonry-scrollview.svg?style=flat-square
+[twitter]: https://twitter.com/dani_akash_
+[twitter-badge]: https://img.shields.io/twitter/follow/dani_akash_?style=social
+[github-watch-badge]: https://img.shields.io/github/watchers/DaniAkash/react-native-masonry-scrollview.svg?style=social
+[github-watch]: https://github.com/DaniAkash/react-native-masonry-scrollview/watchers
+[github-star-badge]: https://img.shields.io/github/stars/DaniAkash/react-native-masonry-scrollview.svg?style=social
+[github-star]: https://github.com/DaniAkash/react-native-masonry-scrollview/stargazers