chore(README): explains the reason of the fork

README.md

@@ -1,9 +1,10 @@
-# HaishinKit
+# ApiVideoHaishinKit (fork of [HaishinKit](https://github.com/shogo4405/HaishinKit.swift))
 [![Platform](https://img.shields.io/cocoapods/p/HaishinKit.svg?style=flat)](http://cocoapods.org/pods/HaishinKit)
 ![Language](https://img.shields.io/badge/language-Swift%205.3-orange.svg)
 [![CocoaPods](https://img.shields.io/cocoapods/v/HaishinKit.svg?style=flat)](http://cocoapods.org/pods/HaishinKit)
 [![GitHub license](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://raw.githubusercontent.com/shogo4405/HaishinKit.swift/master/LICENSE.md)
 
+* The reason of this fork is to develop a RTMP Flutter plugin. For the camera preview of this plugin, we have to access HKView currentSampleBuffer when a new frame has been generated by the camera.
 * Camera and Microphone streaming library via RTMP, HLS for iOS, macOS, tvOS.
 * Issuesの言語は、日本語が分かる方は日本語でお願いします！