Add installation and usage details

Author: darshkpatel

README.md

@@ -1,5 +1,8 @@
-# Remark SnackPlayer
+<h1 align="center"> Remark SnackPlayer </h1>
 
+Remark plugin to embed [Expo Snack's](https://snack.expo.io/) using Code Blocks
+
+<hr>
 
 <p align="center">
 
@@ -15,8 +18,61 @@
 
 </p>
 
-<p align="center">
-  <a href="#key-features">Key Features</a> •
-  <a href="#howto">How To Use</a> •
-  <a href="#credits">Credits</a>
-</p>
+## Installing
+
+`npm install remark-snackplayer`
+
+or
+
+`yarn add remark-snackplayer`
+
+## Usage
+
+This plugin parses codeblocks with language set as `SnackPlayer` and replaces them with embedded Expo's SnackPlayers, you can also provide parameters along with the codeblock to set some basic details.
+
+Example Code Block:
+
+````
+
+```SnackPlayer name=Hello%20World description=This%20is%20a%20description
+import React from 'react';
+import { Text, View } from 'react-native';
+
+const YourApp = () => {
+    return (
+    <View style={{ flex: 1, justifyContent: "center", alignItems: "center" }}>
+        <Text>
+        Try editing me! 🎉
+        </Text>
+    </View>
+    );
+}
+
+export default YourApp;```
+
+
+````
+
+The above code snippet would look like this on your page
+
+<img width="783" alt="Screenshot 2020-10-03 at 1 11 19 AM" src="https://user-images.githubusercontent.com/11258286/94963203-67de3500-0515-11eb-974a-a2289c0bfdc8.png">
+
+
+Parameters:
+
+| Name               | Description                | Default           |
+| ------------------ | -------------------------- | ----------------- |
+| name               | SnackPlayer Name           | "Example"         |
+| description        | Description of the example | "Example usage"   |
+| platform           | Example Platform           | "ios"             |
+| supportedPlatforms | Supported Platforms        | "ios,android,web" |
+
+## To Do
+
+* Support Passing Configuration Parameters
+* Fix and Document Mobile Fallback
+* Write Comprehensive tests
+
+## License
+
+[MIT](./LICENSE) © Darsh Patel